|Highest governing body||FIFA|
|First played||Mid-19th century England|
|Team members||11 per side (including goalkeeper)|
|Mixed-sex||No, separate competitions|
|Type||Team sport, ball sport|
|Equipment||Football (or soccer ball), shin pads|
|Venue||Football pitch (also known as football field, football ground, soccer field, soccer pitch or "pitch")|
|Glossary||Glossary of association football|
|Country or region||Worldwide|
|Olympic||Men's since the 1900 Olympics and women's since the 1996 Olympics|
|Paralympic||5-a-side since 2004 and 7-a-side from 1984 to 2016|
Association football, more commonly known as football or soccer,[a] is a team sport played between two teams of 11 players who primarily use their feet to propel a ball around a rectangular field called a pitch. The objective of the game is to score more goals than the opposite team by moving the ball beyond the goal line into a rectangular-framed goal defended by the opposing side. Traditionally, the game has been played over two 45 minute halves, for a total match time of 90 minutes. With an estimated 250 million players active in over 200 countries and territories, it is considered the world's most popular sport.
The game of association football is played in accordance with the Laws of the Game, a set of rules that has been in effect since 1863 and maintained by the International Football Association Board (IFAB) since 1886. The game is played with a football that is 68–70 cm (27–28 in) in circumference. The two teams compete to get the ball into the other team's goal (between the posts and under the bar), thereby scoring a goal. When the ball is in play, the players mainly use their feet, but may use any other part of their body, except for their hands or arms, to control, strike, or pass the ball. Only the goalkeepers may use their hands and arms, and only then within the penalty area. The team that has scored more goals at the end of the game is the winner. Depending on the format of the competition, an equal number of goals scored may result in a draw being declared, or the game goes into extra time or a penalty shootout.
Internationally, association football is governed by FIFA. Under FIFA, there are six continental confederations: AFC, CAF, CONCACAF, CONMEBOL, OFC and UEFA. National associations (e.g. The FA or JFA) are responsible for managing the game in their own countries both professionally and at an amateur level, and coordinating competitions in accordance with the Laws of the Game. The most senior and prestigious international competitions are the FIFA World Cup and the FIFA Women's World Cup. The men's World Cup is the most-viewed sporting event in the world, surpassing the Olympic Games. The two most prestigious competitions in European club football are the UEFA Champions League and the UEFA Women's Champions League, which attract an extensive television audience throughout the world. The final of the men's tournament has been, in recent years, the most-watched annual sporting event in the world.
Women's association football has historically seen opposition, with national associations severely curbing its development and several outlawing it completely. Restrictions started to be reduced in the 1980s and the first women's World Cup was the 1991 FIFA Women's World Cup in China with only 12 teams from the respective six confederations. By the 2019 FIFA Women's World Cup in France, this had increased to 24 national teams, and a record-breaking 1.12 billion viewers watched the competition.
Football is one of a family of football codes, which emerged from various ball games played worldwide since antiquity. Within the English-speaking world, association football is now usually called "football" in Great Britain and most of Ulster in the north of Ireland, whereas people usually call it "soccer" in regions and countries where other codes of football are prevalent, such as Australia, Canada, South Africa, most of Ireland (excluding Ulster), and the United States; in Japan, the game is also primarily called sakkā (サッカー), derived from "soccer". A notable exception is New Zealand, where in the first two decades of the 21st century, under the influence of international television, "football" has been gaining prevalence, despite the dominance of other codes of football, namely rugby union and rugby league.
The term soccer comes from Oxford "-er" slang, which was prevalent at the University of Oxford in England from about 1875, and is thought to have been borrowed from the slang of Rugby School. Initially spelled assoccer, it was later reduced to the modern spelling. This form of slang also gave rise to rugger for rugby football, fiver and tenner for five pound and ten pound notes, and the now-archaic footer that was also a name for association football. The word soccer arrived at its final form in 1895 and was first recorded in 1889 in the earlier form of socca.
Kicking ball games arose independently multiple times across multiple cultures. Phaininda and episkyros were Greek ball games. An image of an episkyros player depicted in low relief on a stele of c. 375–400 BCE in the National Archaeological Museum of Athens appears on the UEFA European Championship trophy. Athenaeus, writing in 228 CE, mentions the Roman ball game harpastumcode: lat promoted to code: la . Phaininda, episkyros and harpastumcode: lat promoted to code: la were played involving hands and violence. They all appear to have resembled rugby football, wrestling and volleyball more than what is recognizable as modern football. As with pre-codified mob football, the antecedent of all modern football codes, these three games involved more handling the ball than kicking it.
The Chinese competitive game cuju (蹴鞠, literally "kick ball"; also known as tsu chu) resembles modern association football. Cuju players could use any part of the body apart from hands and the intent was to kick a ball through an opening into a net. During the Han dynasty (206 BCE – 220 CE), cuju games were standardised and rules were established. Other games included kemari in Japan and chuk-guk in Korea. In North America, pasuckuakohowog was a ball game played by the Algonquians; it was described as "almost identical to the kind of folk football being played in Europe at the same time, in which the ball was kicked through goals".
Association football in itself does not have a classical history. Notwithstanding any similarities to other ball games played around the world, FIFA has recognised that no historical connection exists with any game played in antiquity outside Europe. The modern rules of association football are based on the mid-19th century efforts to standardise the widely varying forms of football played in the public schools of England. The history of football in England dates back to at least the eighth century.
The Cambridge rules, first drawn up at the University of Cambridge in 1848, were particularly influential in the development of subsequent codes, including association football. The Cambridge rules were written at Trinity College, Cambridge, at a meeting attended by representatives from Eton, Harrow, Rugby, Winchester and Shrewsbury schools. They were not universally adopted. During the 1850s, many clubs unconnected to schools or universities were formed throughout the English-speaking world to play various forms of football. Some came up with their own distinct codes of rules, most notably the Sheffield Football Club, formed by former public school pupils in 1857, which led to the formation of a Sheffield FA in 1867. In 1862, John Charles Thring of Uppingham School also devised an influential set of rules.
These ongoing efforts contributed to the formation of The Football Association (The FA) in 1863, which first met on the morning of 26 October 1863 at the Freemasons' Tavern in Great Queen Street, London. The only school to be represented on this occasion was Charterhouse. The Freemasons' Tavern was the setting for five more meetings of The FA between October and December 1863; the English FA eventually issued the first comprehensive set of rules named Laws of the Game, forming modern football. At the final meeting, the first FA treasurer, the representative from Blackheath F.C., withdrew his club from the FA over the removal of two draft rules at the previous meeting: the first allowed for running with the ball in hand; the second for obstructing such a run by hacking (kicking an opponent in the shins), tripping and holding. Other English rugby clubs followed this lead and did not join the FA, and instead in 1871 formed the Rugby Football Union. The eleven remaining clubs, under the charge of Ebenezer Cobb Morley, went on to ratify the original thirteen laws of the game. These rules included handling of the ball by "marks" and the lack of a crossbar, rules which made it remarkably similar to Victorian rules football being developed at that time in Australia. The Sheffield FA played by its own rules until the 1870s, with the FA absorbing some of its rules until there was little difference between the games.
The world's oldest football competition is the FA Cup, which was founded by the footballer and cricketer Charles W. Alcock, and has been contested by English teams since 1872. The first official international football match also took place in 1872, between Scotland and England in Glasgow, again at the instigation of Alcock. England is also home to the world's first football league, which was founded in Birmingham in 1888 by Aston Villa director William McGregor. The original format contained 12 clubs from the Midlands and Northern England.
The Laws of the Game are determined by the International Football Association Board (IFAB). The board was formed in 1886 after a meeting in Manchester of the Football Association, the Scottish Football Association, the Football Association of Wales, and the Irish Football Association. FIFA, the international football body, was formed in Paris in 1904 and declared that they would adhere to the Laws of the Game of the Football Association. The growing popularity of the international game led to the admittance of FIFA representatives to the IFAB in 1913. The board consists of four representatives from FIFA and one representative from each of the four British associations.
Football is played at a professional level all over the world. Millions of people regularly go to football stadiums to follow their favourite teams, while billions more watch the game on television or on the internet. A very large number of people also play football at an amateur level. According to a survey conducted by FIFA published in 2001, over 240 million people from more than 200 countries regularly play football. Football has the highest global television audience in sport.
In many parts of the world, football evokes great passions and plays an important role in the life of individual fans, local communities, and even nations. Ryszard Kapuściński says that Europeans who are polite, modest, or humble fall easily into rage when playing or watching football games. The Ivory Coast national football team helped secure a truce to the nation's civil war in 2006 and it helped further reduce tensions between government and rebel forces in 2007 by playing a match in the rebel capital of Bouaké, an occasion that brought both armies together peacefully for the first time. By contrast, football is widely considered to have been the final proximate cause for the Football War in June 1969 between El Salvador and Honduras. The sport also exacerbated tensions at the beginning of the Croatian War of Independence of the 1990s, when a match between Dinamo Zagreb and Red Star Belgrade degenerated into rioting in May 1990.
Women's association football
Early women's football
Women may have been playing football for as long as the game has existed. Evidence shows that an ancient version of the game (cuju, or tsu chu) was played by women during the Han dynasty (25–220 CE), as female figures are depicted in frescoes of the period playing tsu chu.
Association football, the modern game, also has documented early involvement of women. An annual competition in Mid-Lothian, Scotland during the 1790s is reported, too. In 1863, football governing bodies introduced standardised rules to prohibit violence on the pitch, making it more socially acceptable for women to play. The first match recorded by the Scottish Football Association took place in 1892 in Glasgow. In England, the first recorded game of football between women took place in 1895.
The best-documented early European team was founded by activist Nettie Honeyball in England in 1894. It was named the British Ladies' Football Club. Nettie Honeyball is quoted as, "I founded the association late last year , with the fixed resolve of proving to the world that women are not the 'ornamental and useless' creatures men have pictured. I must confess, my convictions on all matters where the sexes are so widely divided are all on the side of emancipation, and I look forward to the time when ladies may sit in Parliament and have a voice in the direction of affairs, especially those which concern them most." Honeyball and those like her paved the way for women's football. However, the women's game was frowned upon by the British football associations and continued without their support. It has been suggested that this was motivated by a perceived threat to the 'masculinity' of the game.
Women's football became popular on a large scale at the time of the First World War, when employment in heavy industry spurred the growth of the game, much as it had done for men 50 years earlier. The most successful team of the era was Dick, Kerr Ladies F.C. of Preston, England. The team played in the first women's international matches in 1920, against a team from Paris, France, in April, and also made up most of the England team against a Scottish Ladies XI in 1920, winning 22–0.
Despite being more popular than some men's football events (one match saw a 53,000 strong crowd), women's football in England suffered a blow in 1921 when The Football Association outlawed the playing of the game on association members' pitches, on the grounds that the game (as played by women) was distasteful. Some speculated that this may have also been due to envy of the large crowds that women's matches attracted. This led to the formation of the English Ladies Football Association and play moved to rugby grounds.
Association football has been played by women since at least the time of the first recorded women's games in the late 19th century. It has traditionally been associated with charity games and physical exercise, particularly in the United Kingdom. In the late 1960s and early 1970s, women's association football was organised in the United Kingdom, eventually becoming the most prominent team sport for British women.
20th and 21st century
The growth in women's football has seen major competitions being launched at both national and international level mirroring the male competitions. Women's football has faced many struggles. It had a "golden age" in the United Kingdom in the early 1920s when crowds reached 50,000 at some matches; this was stopped on 5 December 1921 when England's Football Association voted to ban the game from grounds used by its member clubs. The FA's ban was rescinded in December 1969 with UEFA voting to officially recognise women's football in 1971.
Association football is played in accordance with a set of rules known as the Laws of the Game. The game is played using a spherical ball of 68–70 cm (27–28 in) circumference, known as the football (or soccer ball). Two teams of eleven players each compete to get the ball into the other team's goal (between the posts and under the bar), thereby scoring a goal. The team that has scored more goals at the end of the game is the winner; if both teams have scored an equal number of goals then the game is a draw. Each team is led by a captain who has only one official responsibility as mandated by the Laws of the Game: to represent their team in the coin toss before kick-off or penalty kicks.
The primary law is that players other than goalkeepers may not deliberately handle the ball with their hands or arms during play, though they must use both their hands during a throw-in restart. Although players usually use their feet to move the ball around, they may use any part of their body (notably, "heading" with the forehead) other than their hands or arms. Within normal play, all players are free to play the ball in any direction and move throughout the pitch, though players may not pass to teammates who are in an offside position.
During gameplay, players attempt to create goal-scoring opportunities through individual control of the ball, such as by dribbling, passing the ball to a teammate, and by taking shots at the goal, which is guarded by the opposing goalkeeper. Opposing players may try to regain control of the ball by intercepting a pass or through tackling the opponent in possession of the ball; however, physical contact between opponents is restricted. Football is generally a free-flowing game, with play stopping only when the ball has left the field of play or when play is stopped by the referee for an infringement of the rules. After a stoppage, play recommences with a specified restart.
At a professional level, most matches produce only a few goals. For example, the 2005–06 season of the English Premier League produced an average of 2.48 goals per match. The Laws of the Game do not specify any player positions other than goalkeeper, but a number of specialised roles have evolved. Broadly, these include three main categories: strikers, or forwards, whose main task is to score goals; defenders, who specialise in preventing their opponents from scoring; and midfielders, who dispossess the opposition and keep possession of the ball to pass it to the forwards on their team. Players in these positions are referred to as outfield players, to distinguish them from the goalkeeper.
These positions are further subdivided according to the area of the field in which the player spends the most time. For example, there are central defenders and left and right midfielders. The ten outfield players may be arranged in any combination. The number of players in each position determines the style of the team's play; more forwards and fewer defenders creates a more aggressive and offensive-minded game, while the reverse creates a slower, more defensive style of play. While players typically spend most of the game in a specific position, there are few restrictions on player movement, and players can switch positions at any time. The layout of a team's players is known as a formation. Defining the team's formation and tactics is usually the prerogative of the team's manager.
There are 17 laws in the official Laws of the Game, each containing a collection of stipulation and guidelines. The same laws are designed to apply to all levels of football for both sexes, although certain modifications for groups such as juniors, seniors and people with physical disabilities are permitted. The laws are often framed in broad terms, which allow flexibility in their application depending on the nature of the game. The Laws of the Game are published by FIFA, but are maintained by the IFAB. In addition to the seventeen laws, numerous IFAB decisions and other directives contribute to the regulation of association football. Within the United States, Major League Soccer used a distinct ruleset during the 1990s and the National Federation of State High School Associations and National Collegiate Athletic Association still use rulesets that are comparable to, but different from, the IFAB Laws.
Players, equipment, and officials
Each team consists of a maximum of eleven players (excluding substitutes), one of whom must be the goalkeeper. Competition rules may state a minimum number of players required to constitute a team, which is usually seven. Goalkeepers are the only players allowed to play the ball with their hands or arms, provided they do so within the penalty area in front of their own goal. Though there are a variety of positions in which the outfield (non-goalkeeper) players are strategically placed by a coach, these positions are not defined or required by the Laws.
The basic equipment or kit players are required to wear includes a shirt, shorts, socks, footwear and adequate shin guards. An athletic supporter and protective cup is highly recommended for male players by medical experts and professionals. Headgear is not a required piece of basic equipment, but players today may choose to wear it to protect themselves from head injury. Players are forbidden to wear or use anything that is dangerous to themselves or another player, such as jewellery or watches. The goalkeeper must wear clothing that is easily distinguishable from that worn by the other players and the match officials.
A number of players may be replaced by substitutes during the course of the game. The maximum number of substitutions permitted in most competitive international and domestic league games is five in ninety minutes, with each team being allowed one more if the game should go into extra-time; the permitted number may vary in other competitions or in friendly matches. Common reasons for a substitution include injury, tiredness, ineffectiveness, a tactical switch, or timewasting at the end of a finely poised game. In standard adult matches, a player who has been substituted may not take further part in a match. IFAB recommends "that a match should not continue if there are fewer than seven players in either team". Any decision regarding points awarded for abandoned games is left to the individual football associations.
A game is officiated by a referee, who has "full authority to enforce the Laws of the Game in connection with the match to which he has been appointed" (Law 5), and whose decisions are final. The referee is assisted by two assistant referees. In many high-level games there is also a fourth official who assists the referee and may replace another official should the need arise.
Goal line technology is used to measure if the whole ball has crossed the goal-line thereby determining whether a goal has been scored or not; this was brought in to prevent controversy. Video assistant referees (VAR) have also been increasingly introduced in high-level matches to assist officials through video replays to correct clear and obvious mistakes. There are four types of calls that can be reviewed: mistaken identity in awarding a red or yellow card, goals and whether there was a violation during the buildup, direct red card decisions, and penalty decisions.
The ball is spherical with a circumference of between 68 and 70 cm (27 and 28 in), a weight in the range of 410 to 450 g (14 to 16 oz), and a pressure between 0.6 and 1.1 standard atmospheres (8.5 and 15.6 pounds per square inch) at sea level. In the past the ball was made up of leather panels sewn together, with a latex bladder for pressurisation, but modern balls at all levels of the game are now synthetic.
As the Laws were formulated in England, and were initially administered solely by the four British football associations within IFAB, the standard dimensions of a football pitch were originally expressed in imperial units. The Laws now express dimensions with approximate metric equivalents (followed by traditional units in brackets), though use of imperial units remains popular in English-speaking countries with a relatively recent history of metrication (or only partial metrication), such as Britain.
The length of the pitch, or field, for international adult matches is in the range of 100–110 m (110–120 yd) and the width is in the range of 64–75 m (70–80 yd). Fields for non-international matches may be 90–120 m (100–130 yd) in length and 45–90 m (50–100 yd) in width, provided that the pitch does not become square. In 2008, the IFAB initially approved a fixed size of 105 m (115 yd) long and 68 m (74 yd) wide as a standard pitch dimension for international matches; however, this decision was later put on hold and was never actually implemented.
The longer boundary lines are touchlines, while the shorter boundaries (on which the goals are placed) are goal lines. A rectangular goal is positioned on each goal line, midway between the two touchlines. The inner edges of the vertical goal posts must be 7.32 m (24 ft) apart, and the lower edge of the horizontal crossbar supported by the goal posts must be 2.44 m (8 ft) above the ground. Nets are usually placed behind the goal, but are not required by the Laws.
In front of the goal is the penalty area. This area is marked by the goal line, two lines starting on the goal line 16.5 m (18 yd) from the goalposts and extending 16.5 m (18 yd) into the pitch perpendicular to the goal line, and a line joining them. This area has a number of functions, the most prominent being to mark where the goalkeeper may handle the ball and where a penalty foul by a member of the defending team becomes punishable by a penalty kick. Other markings define the position of the ball or players at kick-offs, goal kicks, penalty kicks and corner kicks.
Duration and tie-breaking methods
90-minute ordinary time
A standard adult football match consists of two halves of 45 minutes each. Each half runs continuously, meaning that the clock is not stopped when the ball is out of play. There is usually a 15-minute half-time break between halves. The end of the match is known as full-time. The referee is the official timekeeper for the match, and may make an allowance for time lost through substitutions, injured players requiring attention, or other stoppages. This added time is called "additional time" in FIFA documents, but is most commonly referred to as stoppage time or injury time, while lost time can also be used as a synonym. The duration of stoppage time is at the sole discretion of the referee. Stoppage time does not fully compensate for the time in which the ball is out of play, and a 90-minute game typically involves about an hour of "effective playing time". The referee alone signals the end of the match. In matches where a fourth official is appointed, towards the end of the half, the referee signals how many minutes of stoppage time they intend to add. The fourth official then informs the players and spectators by holding up a board showing this number. The signalled stoppage time may be further extended by the referee. Added time was introduced because of an incident which happened in 1891 during a match between Stoke and Aston Villa. Trailing 1–0 with two minutes remaining, Stoke were awarded a penalty kick. Villa's goalkeeper deliberately kicked the ball out of play; by the time it was recovered, the clock had run out and the game was over, leaving Stoke unable to attempt the penalty. The same law also states that the duration of either half is extended until the penalty kick to be taken or retaken is completed; thus, no game can end with an uncompleted penalty.
In league competitions, games may end in a draw. In knockout competitions where a winner is required, various methods may be employed to break such a deadlock; some competitions may invoke replays. A game tied at the end of regulation time may go into extra time, which consists of two further 15-minute periods. If the score is still tied after extra time, some competitions allow the use of penalty shootouts (known officially in the Laws of the Game as "kicks from the penalty mark") to determine which team will progress to the next stage of the tournament or be the champion. Goals scored during extra time periods count towards the final score of the game, but kicks from the penalty mark are only used to decide the team that progresses to the next part of the tournament, with goals scored in a penalty shootout not making up part of the final score.
In competitions using two-legged matches, each team competes at home once, with an aggregate score from the two matches deciding which team progresses. Where aggregates are equal, the away goals rule may be used to determine the winners, in which case the winner is the team that scored the most goals in the leg they played away from home. If the result is still equal, extra time and potentially a penalty shootout are required.
Ball in and out of play
Under the Laws, the two basic states of play during a game are ball in play and ball out of play. From the beginning of each playing period with a kick-off until the end of the playing period, the ball is in play at all times, except when either the ball leaves the field of play, or play is stopped by the referee. When the ball becomes out of play, play is restarted by one of eight restart methods depending on how it went out of play:
- Kick-off: following a goal by the opposing team, or to begin each period of play.
- Throw-in: when the ball has crossed the touchline; awarded to the opposing team to that which last touched the ball.
- Goal kick: when the ball has wholly crossed the goal line without a goal having been scored and having last been touched by a player of the attacking team; awarded to defending team.
- Corner kick: when the ball has wholly crossed the goal line without a goal having been scored and having last been touched by a player of the defending team; awarded to attacking team.
- Indirect free kick: awarded to the opposing team following "non-penal" fouls, certain technical infringements, or when play is stopped to caution or dismiss an opponent without a specific foul having occurred. A goal may not be scored directly (without the ball first touching another player) from an indirect free kick.
- Direct free kick: awarded to fouled team following certain listed "penal" fouls. A goal may be scored directly from a direct free kick.
- Penalty kick: awarded to the fouled team following a foul usually punishable by a direct free kick but that has occurred within their opponent's penalty area.
- Dropped-ball: occurs when the referee has stopped play for any other reason, such as a serious injury to a player, interference by an external party, or a ball becoming defective.
A foul occurs when a player commits an offence listed in the Laws of the Game while the ball is in play. The offences that constitute a foul are listed in Law 12. Handling the ball deliberately, tripping an opponent, or pushing an opponent, are examples of "penal fouls", punishable by a direct free kick or penalty kick depending on where the offence occurred. Other fouls are punishable by an indirect free kick.
The referee may punish a player's or substitute's misconduct by a caution (yellow card) or dismissal (red card). A second yellow card in the same game leads to a red card, which results in a dismissal. A player given a yellow card is said to have been "booked", the referee writing the player's name in their official notebook. If a player has been dismissed, no substitute can be brought on in their place and the player may not participate in further play. Misconduct may occur at any time, and while the offences that constitute misconduct are listed, the definitions are broad. In particular, the offence of "unsporting behaviour" may be used to deal with most events that violate the spirit of the game, even if they are not listed as specific offences. A referee can show a yellow or red card to a player, substitute, substituted player, and to non-players such as managers and support staff.
Rather than stopping play, the referee may allow play to continue if doing so will benefit the team against which an offence has been committed. This is known as "playing an advantage". The referee may "call back" play and penalise the original offence if the anticipated advantage does not ensue within "a few seconds". Even if an offence is not penalised due to advantage being played, the offender may still be sanctioned for misconduct at the next stoppage of play.
The referee's decision in all on-pitch matters is considered final. The score of a match cannot be altered after the game, even if later evidence shows that decisions (including awards/non-awards of goals) were incorrect.
Along with the general administration of the sport, football associations and competition organisers also enforce good conduct in wider aspects of the game, dealing with issues such as comments to the press, clubs' financial management, doping, age fraud and match fixing. Most competitions enforce mandatory suspensions for players who are sent off in a game. Some on-field incidents, if considered very serious (such as allegations of racial abuse), may result in competitions deciding to impose heavier sanctions than those normally associated with a red card.[b] Some associations allow for appeals against player suspensions incurred on-field if clubs feel a referee was incorrect or unduly harsh.
Sanctions for such infractions may be levied on individuals or on clubs as a whole. Penalties may include fines, point deductions (in league competitions) or even expulsion from competitions. For example, the English Football League deduct 12 points from any team that enters financial administration. Among other administrative sanctions are penalties against game forfeiture. Teams that had forfeited a game or had been forfeited against would be awarded a technical loss or win.
The recognised international governing body of football (and associated games, such as futsal and beach soccer) is FIFA. The FIFA headquarters are located in Zürich, Switzerland. Six regional confederations are associated with FIFA; these are:
- Asia: Asian Football Confederation (AFC)
- Africa: Confederation of African Football (CAF)
- Europe: Union of European Football Associations (UEFA)
- North/Central America & Caribbean: Confederation of North, Central American and Caribbean Association Football (CONCACAF)
- Oceania: Oceania Football Confederation (OFC)
- South America: Confederación Sudamericana de Fútbol (South American Football Confederation; CONMEBOL)
National associations oversee football within individual countries. These are generally synonymous with sovereign states (for example, the Cameroonian Football Federation in Cameroon), but also include a smaller number of associations responsible for sub-national entities or autonomous regions (for example, the Scottish Football Association in Scotland). 209 national associations are affiliated both with FIFA and with their respective continental confederations.
While FIFA is responsible for arranging competitions and most rules related to international competition, the actual Laws of the Game are set by the IFAB, where each of the UK Associations has one vote, while FIFA collectively has four votes.
International competitions in association football principally consist of two varieties: competitions involving representative national teams or those involving clubs based in multiple nations and national leagues. International football, without qualification, most often refers to the former. In the case of international club competition, it is the country of origin of the clubs involved, not the nationalities of their players, that renders the competition international in nature.
The major international competition in football is the World Cup, organised by FIFA. This competition has taken place every four years since 1930, with the exception of the 1942 and 1946 tournaments, which were cancelled because of World War II. Approximately 190–200 national teams compete in qualifying tournaments within the scope of continental confederations for a place in the finals. The finals tournament, held every four years, involves 32 national teams competing over a four-week period.[c] The World Cup is the most prestigious association football tournament as well as the most widely viewed and followed sporting event in the world, exceeding even the Olympic Games; the cumulative audience of all matches of the 2006 FIFA World Cup was estimated to be 26.29 billion with an estimated 715.1 million people watching the final match, a ninth of the entire population of the planet. The current champions are Argentina, who won their third title at the 2022 tournament in Qatar. The FIFA Women's World Cup has been held every four years since 1991. Under the tournament's current format, national teams vie for 31 slots in a three-year qualification phase, with the host nation's team entering automatically as the 32nd slot. The current champions are the United States, after winning their fourth title in the 2019 tournament.
There has been a football tournament at every Summer Olympic Games since 1900, except at the 1932 games in Los Angeles. Before the inception of the World Cup, the Olympics (especially during the 1920s) were the most prestigious international event. Originally, the tournament was for amateurs only. As professionalism spread around the world, the gap in quality between the World Cup and the Olympics widened. The countries that benefited most were the Soviet Bloc countries of Eastern Europe, where top athletes were state-sponsored while retaining their status as amateurs. Between 1948 and 1980, 23 out of 27 Olympic medals were won by Eastern Europe, with only Sweden (gold in 1948 and bronze in 1952), Denmark (bronze in 1948 and silver in 1960) and Japan (bronze in 1968) breaking their dominance. For the 1984 Los Angeles Games, the IOC decided to admit professional players. Since 1992, male competitors must be under 23 years old, although since 1996, three players over the age of 23 have been allowed per squad. A women's tournament was added in 1996; in contrast to the men's event, full international sides without age restrictions play the women's Olympic tournament.
After the World Cup, the most important international football competitions are the continental championships, which are organised by each continental confederation and contested between national teams. These are the European Championship (UEFA), the Copa América (CONMEBOL), the African Cup of Nations (CAF), the Asian Cup (AFC), the CONCACAF Gold Cup (CONCACAF) and the OFC Nations Cup (OFC). The FIFA Confederations Cup was contested by the winners of all six continental championships, the current FIFA World Cup champions and the country which was hosting the next World Cup. This was generally regarded as a warm-up tournament for the upcoming FIFA World Cup and did not carry the same prestige as the World Cup itself. The tournament was discontinued following the 2017 edition. The UEFA Nations League and the CONCACAF Nations League also exist.
The most prestigious competitions in club football are the respective continental championships, which are generally contested between national champions, for example, the UEFA Champions League in Europe and the Copa Libertadores in South America. The winners of each continental competition contest the FIFA Club World Cup.
The governing bodies in each country operate league systems in a domestic season, normally comprising several divisions, in which the teams gain points throughout the season depending on results. Teams are placed into tables, placing them in order according to points accrued. Most commonly, each team plays every other team in its league at home and away in each season, in a round-robin tournament. At the end of a season, the top team is declared the champion. The top few teams may be promoted to a higher division, and one or more of the teams finishing at the bottom are relegated to a lower division.
The teams finishing at the top of a country's league may also be eligible to play in international club competitions in the following season. The main exceptions to this system occur in some Latin American leagues, which divide football championships into two sections named Apertura and Clausura (Spanish for Opening and Closing), awarding a champion for each. The majority of countries supplement the league system with one or more "cup" competitions organised on a knock-out basis.
Some countries' top divisions feature highly paid star players; in smaller countries, lower divisions, and most of women's clubs, players may be part-timers with a second job, or amateurs. The five top European leagues – Bundesliga (Germany), Premier League (England), La Liga (Spain), Serie A (Italy), and Ligue 1 (France) – attract most of the world's best players and each of these leagues has a total wage cost in excess of £600 million/€763 million/US$1.185 billion.
- "In a globalised world, the football World Cup is a force for good". The Conversation. 10 July 2014. Archived from the original on 8 August 2014. Retrieved 11 July 2014.
- "MLS as a Sports Product—The Prominence of the World's Game in the U.S. - Working Paper - Faculty & Research - Harvard Business School". www.hbs.edu. Retrieved 29 January 2023.
- "History of Football – Britain, the home of Football". FIFA. Archived from the original on 28 March 2013.
- "History of Football – The Origins". FIFA. Archived from the original on 28 October 2017. Retrieved 29 April 2013.
- "Procedures to determine the winner of a match or home-and-away" (PDF). Laws of the Game 2010/2011. FIFA. pp. 51–52. Archived from the original (PDF) on 28 June 2021. Retrieved 4 March 2011.
- "2002 FIFA World Cup TV Coverage". FIFA. 5 December 2006. Archived from the original on 14 March 2005. Retrieved 6 January 2008.
- "Champions League final tops Super Bowl for TV market". BBC Sport. British Broadcasting Corporation. 31 January 2010. Archived from the original on 12 January 2016. Retrieved 25 February 2010.
- Glass, Alana (21 October 2019). "FIFA Women's World Cup Breaks Viewership Records". Forbes. Archived from the original on 24 April 2021. Retrieved 24 April 2021.
- Manfred, Tony (14 June 2014). "The Real Reason We Call It 'Soccer' Is All England's Fault". Business Insider Australia. Archived from the original on 27 April 2021. Retrieved 27 April 2021.
- "Why Do Some People Call Football "Soccer"? | Britannica". www.britannica.com. Archived from the original on 31 January 2022. Retrieved 23 December 2021.
- "Editorial: Soccer – or should we say football – must change". New Zealand Herald. 11 June 2014. Archived from the original on 27 April 2021. Retrieved 27 April 2021.
- "There is no easier way to annoy a British soccer fan than referring to soccer as 'soccer'". The Irish Times. Retrieved 30 November 2022.
- "What's The Origin of the Word "Soccer"? | Lexico". Lexico Dictionaries | English. Archived from the original on 2 May 2021. Retrieved 22 March 2021.
- "soccer | Origin and meaning of soccer by Online Etymology Dictionary". www.etymonline.com. Archived from the original on 30 October 2018. Retrieved 29 October 2018.
- Item (NAMA) 873 Archived 22 July 2016 at the Wayback Machine displayed at the National Archaeological Museum, Athens
- "Classic Football History of the Game". FIFA. Archived from the original on 25 December 2012. Retrieved 17 September 2013.
- "A gripping Greek derby". FIFA.com. Archived from the original on 2 November 2020. Retrieved 30 October 2020.
- "Fury as FIFA finds a field of dreams in China". Bangkok Post. 5 June 2014.
- Murray, Scott (2010). Football For Dummies. John Wiley & Sons. pp. 33–. ISBN 978-0-470-66440-7. Archived from the original on 20 April 2021. Retrieved 20 April 2021.
- Nigel Wilson, Encyclopedia of Ancient Greece, Routledge, 2005, p. 310
- Nigel M. Kennell, The Gymnasium of Virtue: Education and Culture in Ancient Sparta (Studies in the History of Greece and Rome), The University of North Carolina Press, 1995, on Google Books Archived 5 December 2016 at the Wayback Machine
- Steve Craig, Sports and Games of the Ancients: (Sports and Games Through History), Greenwood, 2002, on Google Books Archived 6 December 2016 at the Wayback Machine
- Don Nardo, Greek and Roman Sport, Greenhaven Press, 1999, p. 83
- Sally E. D. Wilkins, Sports and games of medieval cultures, Greenwood, 2002, on Google books Archived 6 December 2016 at the Wayback Machine
- "Rugby Football History". Rugby Football History. Archived from the original on 25 May 2017. Retrieved 19 June 2014.
- "Classic Football History of the Game". FIFA. Archived from the original on 28 March 2013. Retrieved 17 September 2013.
- "Sports". Encyclopedia Britannica. Archived from the original on 17 April 2021. Retrieved 20 April 2021.
- "History of Football – The Origins". FIFA. Archived from the original on 3 August 2015. Retrieved 15 December 2017.
- Chadwick, Simon; Hamil, Sean, eds. (2010). Managing Football: An International Perspective. London: Routledge. p. 458. ISBN 978-1-136-43763-2. Archived from the original on 20 November 2018. Retrieved 30 May 2018.
- Roberts, Mike (13 April 2011). "Little Brothers of War Ball games in Pre-Colombian North America". The same old game: the true story of the ancient origins of football. Barcelona. ISBN 978-1-4610-9319-0. OCLC 1022073321. Archived from the original on 12 February 2022. Retrieved 6 January 2021.
- "Classic Football History of the Game". FIFA. 10 June 2014. Archived from the original on 28 March 2013. Retrieved 19 June 2014.
- "History of Football – Britain, the home of Football". FIFA. Archived from the original on 1 July 2007. Retrieved 20 November 2006.
- Harvey, Adrian (2005). Football, the first hundred years. London: Routledge. p. 126. ISBN 978-0-415-35018-1.
- Winner, David (28 March 2005). "The hands-off approach to a man's game". The Times. London. Archived from the original on 28 May 2020. Retrieved 7 October 2007.
- "History of the FA". The Football Association. Archived from the original on 25 January 2013. Retrieved 9 October 2007.
- Young, Percy M. (1964). Football in Sheffield. S. Paul. pp. 28–29.
- "The History of the Football League". The Football League. 22 September 2010. Archived from the original on 1 May 2011. Retrieved 4 March 2011.
- Parrish, Charles; Nauright, John (2014). Soccer around the World: A Cultural Guide to the World's Favorite Sport. Santa Barbara, CA: ABC-CLIO. p. 78. ISBN 978-1-61069-302-8. Archived from the original on 26 October 2019. Retrieved 8 December 2018.
- "IFAB". FIFA. Archived from the original on 8 October 2011. Retrieved 10 December 2011.
- "The International FA Board". FIFA. Archived from the original on 22 April 2007. Retrieved 2 September 2007.
- "Where it all began". FIFA. Archived from the original on 8 June 2007. Retrieved 8 June 2007.
- "The IFAB: How it works". FIFA.com. Archived from the original on 29 January 2021. Retrieved 30 October 2020.
- Ingle, Sean; Glendenning, Barry (9 October 2003). "Baseball or Football: which sport gets the higher attendance?". The Guardian. UK. Archived from the original on 11 April 2008. Retrieved 5 June 2006.
- "TV Data". FIFA. Archived from the original on 22 September 2007. Retrieved 2 September 2007.
- "2014 FIFA World Cup™ reached 3.2 billion viewers, one billion watched final". FIFA. 16 December 2015. Archived from the original on 19 December 2015. Retrieved 17 March 2017.
- "FIFA Survey: approximately 250 million footballers worldwide" (PDF). FIFA. Archived from the original (PDF) on 15 September 2006. Retrieved 15 September 2006.
- "2006 FIFA World Cup broadcast wider, longer and farther than ever before". FIFA. 6 February 2007. Archived from the original on 11 January 2012. Retrieved 11 October 2009.
- Kapuscinski, Ryszard (2007). The Soccer War.
- Stormer, Neil (20 June 2006). "More than a game". Common Ground News Service. Archived from the original on 26 June 2010. Retrieved 2 March 2010.
- Austin, Merrill (10 July 2007). "Best Feet Forward". Vanity Fair. Archived from the original on 28 February 2010. Retrieved 2 March 2010.
- Dart, James; Bandini, Paolo (21 February 2007). "Has football ever started a war?". The Guardian. London. Archived from the original on 29 October 2007. Retrieved 24 September 2007.
- Drezner, Daniel (4 June 2006). "The Soccer Wars". The Washington Post. p. B01. Archived from the original on 3 October 2018. Retrieved 21 May 2008.
- "Genesis of the Global Game". The Global Game. Archived from the original on 21 May 2006. Retrieved 22 May 2006.
- "The Chinese and Tsu Chu". The Football Network. Archived from the original on 6 November 2012. Retrieved 1 May 2006.
- "A Brief History of Women's Football". Scottish Football Association. Archived from the original on 8 March 2005. Retrieved 18 November 2013.
- "A game of two sexes". The Herald. Glasgow. 8 February 1997. Archived from the original on 7 November 2017. Retrieved 18 June 2017.
- "Women's Football History". The Football Association. Archived from the original on 25 March 2009.
- "How women's football battled for survival". BBC. 3 June 2005. Archived from the original on 12 January 2016. Retrieved 12 March 2011.
- "Women's involvement with soccer was part of the emancipation process". SoccerTimes. Archived from the original on 16 November 2006. Retrieved 4 May 2006.
- Mårtensson, Stefan (June 2010). "Branding women's football in a field of hegemonic masculinity". Entertainment and Sports Law Journal. 8 (1): 5. doi:10.16997/eslj.44.
- Leighton, Tony (10 February 2008). "FA apologies for 1921 ban". The Guardian. Archived from the original on 10 August 2014. Retrieved 6 August 2014.
- Witzig, Richard (2006). The Global Art of Soccer. CusiBoy Publishing. p. 65. ISBN 978-0-9776688-0-9. Archived from the original on 1 June 2021. Retrieved 6 August 2014.
- "Trail-blazers who pioneered women's football". BBC. 3 June 2005. Archived from the original on 14 August 2017. Retrieved 12 March 2011.
- Newsham, Gail (2014). In a League of Their Own. The Dick, Kerr Ladies 1917–1965. Paragon Publishing.
- Campbell, Alan (19 October 2012). "No longer the game of two-halves". The Herald. Herald & Times Group. Archived from the original on 29 March 2014. Retrieved 9 March 2014.
- Gregory, Patricia (3 June 2005). "How women's football battled for survival". BBC Sport. BBC. Archived from the original on 2 December 2017. Retrieved 19 February 2010.
- Alexander, Shelley (3 June 2005). "Trail-blazers who pioneered women's football". BBC Sport. BBC. Archived from the original on 2 December 2017. Retrieved 19 February 2010.
- "Tournaments: Women's World Cup". FIFA. Archived from the original on 30 April 2011. Retrieved 11 March 2011.
- Moore, Kevin (2015). "Football and the Olympics and Paralympics". In Hassan, David; Mitra, Shakya (eds.). The Olympic Games: Meeting New Global Challenges. London: Routledge. p. 68. ISBN 978-0-415-74176-7. Archived from the original on 26 October 2019. Retrieved 8 January 2019.
- "Circumference – FIFA Quality Programme". Archived from the original on 19 November 2016.
- "How to head a football". Archived from the original on 3 April 2011. Retrieved 3 January 2011.
- "Laws of the game (Law 12)". FIFA. Archived from the original on 11 October 2007. Retrieved 24 September 2007.
- "Law 11 – Offside" (PDF). Laws of the Game 2010/2011. FIFA. p. 31. Archived from the original (PDF) on 4 July 2010. Retrieved 4 March 2011.
- "Laws of the game (Law 8)". FIFA. Archived from the original on 13 September 2007. Retrieved 24 September 2007.
- "England Premiership (2005/2006)". Sportpress.com. Archived from the original on 27 September 2007. Retrieved 5 June 2007.
- "Laws of the game (Law 3–Number of Players)". FIFA. Archived from the original on 13 September 2007. Retrieved 24 September 2007.
- "Soccer positions explained: names, numbers and what they do". Bundesliga. Archived from the original on 28 February 2021. Retrieved 3 February 2021.
- "Positions guide, Who is in a team?". BBC Sport. 1 September 2005. Archived from the original on 5 November 2006. Retrieved 24 September 2007.
- "Formations". BBC Sport. 1 September 2005. Archived from the original on 25 August 2007. Retrieved 24 September 2007.
- "Laws of the Game". FIFA. Archived from the original on 1 September 2007. Retrieved 2 September 2007.
- "Offside and handball laws under Ifab review along with concussion substitutions". BBC Sport. 29 February 2020. Archived from the original on 31 January 2021. Retrieved 3 December 2020.
- Reilly, Thomas; Williams, A. Mark, eds. (2005). Science and Soccer (Second ed.). London: Routledge. p. 235. ISBN 978-0-415-26231-6. Archived from the original on 12 February 2022. Retrieved 3 December 2020.
- Maurer, Pablo. "How U.S. soccer experimented with 10 changes to the game before launching MLS". The Athletic. Retrieved 8 November 2021.
- "Health Advice for Boys". Strikingeagles.tripod.com. Archived from the original on 27 September 2013. Retrieved 24 September 2013.
- "Soccer Position Paper" (PDF). Archived (PDF) from the original on 28 September 2013. Retrieved 24 September 2013.
- "Football's biggest headache". Marca. Spain. 12 March 2017. Archived from the original on 17 May 2018. Retrieved 17 May 2018.
- "Laws of the game (Law 4–Players' Equipment)". FIFA. Archived from the original on 13 September 2007. Retrieved 24 September 2007.
- "Five substitutions permitted in all top-level competitions from 2022/23". 90min.com. 13 June 2022. Retrieved 13 January 2023.
- "Laws of the game (Law 3–Substitution procedure)". FIFA. Archived from the original on 11 October 2007. Retrieved 24 September 2007.
- "Law 3 – The Number of Players" (PDF). Laws of the Game 2010/2011. FIFA. p. 62. Archived from the original (PDF) on 4 July 2010. Retrieved 4 March 2011.
- "Laws of the game (Law 5 – The referee)". FIFA. Archived from the original on 13 September 2007. Retrieved 24 September 2007.
- "Video Assistant Referees (VARs) Experiment – Protocol (Summary)". International Football Association Board. 26 April 2017. Archived from the original (PDF) on 27 April 2017. Retrieved 26 April 2017.
- "Laws of the Game 2013/2014" (PDF). FIFA. Archived from the original (PDF) on 17 July 2013.
- "Football manufacturing". FIFA quality program. FIFA. Archived from the original on 4 September 2016. Retrieved 3 July 2014.
- Summers, Chris (2 September 2004). "Will we ever go completely metric?". BBC News. Archived from the original on 10 October 2007. Retrieved 7 October 2007.
- "Goal-line technology put on ice". FIFA. 8 March 2008. Archived from the original on 22 March 2019. Retrieved 19 June 2010.
- "FIFA Amendments to the Laws of the Game, 2008" (PDF). FIFA. Archived from the original (PDF) on 30 April 2011. Retrieved 4 March 2011.
- "Laws of the game (Law 1.1 – The field of play)". FIFA. Archived from the original on 13 September 2007. Retrieved 24 September 2007.
- "Laws of the game (Law 1.4 – The Field of play)". FIFA. Archived from the original on 11 October 2007. Retrieved 24 September 2007.
- "Laws of the game (Law 1.3 – The field of play)". FIFA. Archived from the original on 11 October 2007. Retrieved 24 September 2007.
- "Laws of the game (Law 7.2 – The duration of the match)". FIFA. Archived from the original on 11 October 2007. Retrieved 24 September 2007.
- "Interpretation of the Laws of the Game – Law 07" (PDF). FIFA. Archived from the original (PDF) on 21 July 2012.
- "Law 7 – The Duration of the Match" (PDF). FIFA. Archived from the original (PDF) on 4 March 2011.
- "Football reforms: Scrapping 45-minute half to be debated at Ifab". BBC Sport. 18 June 2017. Archived from the original on 22 March 2018. Retrieved 7 March 2018.
- We Timed Every Game. World Cup Stoppage Time Is Wildly Inaccurate Archived 12 November 2020 at the Wayback Machine, David Bunnell, FiveThirtyEight, 27 June 2018
- The Sunday Times Illustrated History of Football Reed International Books Limited 1996. p. 11 ISBN 1-85613-341-9
- "Laws of the game (Law 7.3 – The duration of the match)". FIFA. Archived from the original on 19 October 2007. Retrieved 3 March 2010.
- For example, in the FA Cup prior to the semi-finals.
- "Laws of the game (Law 15 – The Throw-in)". FIFA. Archived from the original on 13 September 2007. Retrieved 14 October 2007.
- "Laws of the game (Law 16 – The Goal Kick)". FIFA. Archived from the original on 13 September 2007. Retrieved 14 October 2007.
- "Laws of the game (Law 17 – The Corner Kick)". FIFA. Archived from the original on 13 September 2007. Retrieved 14 October 2007.
- "Laws of the game (Law 13 – Free Kicks)". FIFA. Archived from the original on 13 September 2007. Retrieved 14 October 2007.
- "Laws of the game (Law 14 – The Penalty Kick)". FIFA. Archived from the original on 13 September 2007. Retrieved 14 October 2007.
- "How cards for managers has improved behaviour in the technical area". The Independent. 13 May 2020. Retrieved 13 January 2023.
- "Referee's signals: advantage". BBC Sport. 14 September 2005. Archived from the original on 12 January 2016. Retrieved 4 March 2011.
- "Law 5: The Referee: Advantage" (PDF). Laws of the Game 2010/2011. FIFA. p. 66. Archived from the original (PDF) on 4 July 2010. Retrieved 4 March 2011.
- "Law 5: The Referee" (PDF). The Laws of the Game. FIFA. p. 24. Archived from the original (PDF) on 6 August 2013. Retrieved 5 May 2012.
- For example, see The Football Association's rules regarding player suspensions in FA competitions: "DISCIPLINARY PROCEDURES". The Football Association. Archived from the original on 6 November 2016. Retrieved 1 February 2016.
- "Football League administration penalty raised to 12 points". BBC Sport. 5 June 2015. Archived from the original on 4 August 2018. Retrieved 17 May 2018.
- "Confederations". FIFA. Archived from the original on 11 January 2012. Retrieved 4 March 2011.
- "2006 FIFA World Cup broadcast wider, longer and farther than ever before". FIFA. 6 February 2007. Archived from the original on 20 January 2012. Retrieved 11 October 2009.
- Tom Dunmore, Historical Dictionary of Soccer Archived 7 January 2017 at the Wayback Machine, p. 235, quote "The World Cup is now the most-watched sporting event in the world on television, above even the Olympic Games."
- Stephen Dobson and John Goddard, The Economics of Football Archived 7 January 2017 at the Wayback Machine, p. 407, quote "The World Cup is the most widely viewed sporting event in the world: the estimated cumulative television audience for the 2006 World Cup in Germany was 26.2 billion, an average of 409 million viewers per match."
- Glenn M. Wong, The Comprehensive Guide to Careers in Sports Archived 7 January 2017 at the Wayback Machine, p. 144, quote "The World Cup is the most-watched sporting event in the world. In 2006, more than 30 billion viewers in 214 countries watched the World Cup on television, and more than 3.3 million spectators attended the 64 matches of the tournament."
- Mcnulty, Phil. "Argentina win dramatic World Cup final on penalties". BBC Sport. BBC. Retrieved 19 December 2022.
- "Football Equipment and History". International Olympic Committee (IOC). Archived from the original on 6 July 2014. Retrieved 4 March 2011.
- "Event Guide – Football". sportinglife. 365 media group. Archived from the original on 30 April 2011. Retrieved 5 March 2011.
- "Organising Committee strengthens FIFA Club World Cup format". FIFA. 14 August 2007. Archived from the original on 31 May 2008. Retrieved 7 October 2007.
- McMahon, Bobby (21 December 2017). "El Clásico Is A Must-See Game, But Is Its Global Audience Overstated?". Forbes. Archived from the original on 18 May 2018. Retrieved 17 May 2018.
- Fort, Rodney (September 2000). "European and North American Sports Differences(?)". Scottish Journal of Political Economy. 47 (4): 431–55. doi:10.1111/1467-9485.00172.
- "Estudiantes win Argentina Apertura title". Fox Sports. Associated Press. 13 December 2010. Archived from the original on 23 June 2013. Retrieved 4 March 2011.
Under the system used in Argentina and most of Latin America, two season titles are awarded each year – the Apertura and Clausura.
- Hughes, Ian (31 March 2008). "Premier League conquering Europe". BBC Sport. Archived from the original on 18 November 2018. Retrieved 27 May 2008.
- Taylor, Louise (29 May 2008). "Leading clubs losing out as players and agents cash in". The Guardian. London. Archived from the original on 7 April 2013. Retrieved 28 November 2008.
- Fédération internationale de football association (FIFA) (in English, Arabic, French, German, and Spanish)
- International Football Association Board (IFAB) (in English, French, German, and Spanish)
- Association football at Curlie