Association football

Association football, more commonly known as just football or soccer, is a team sport played between two teams of 11 players who almost exclusively use their feet to propel a ball around a pitch. The objective of the game is to score more goals than the opposing team by moving the ball beyond the goal line into a rectangular-framed goal defended by the opponent. 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 the world's most popular sport. 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. When the ball is in play, the players mainly use their feet, but may also use any other part of their body, except for their hands or arms, to control, strike, or pass the ball; the head, chest, and thighs are commonly used. Only the goalkeepers may use their hands and arms, but only within their own penalty area. Depending on the format of the competition, an equal number of goals scored may result in a draw being declared with 1 point awarded to each team, or the game may go into extra time or a penalty shoot-out. Internationally, association football is governed by FIFA. Under FIFA, there are six continental confederations: AFC, CAF, CONCACAF, CONMEBOL, OFC, and UEFA. National associations (e . the FA in England, U . Soccer in the United States, etc.) 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 prestigious senior international competition is the FIFA World Cup. The men's World Cup is the most-viewed sporting event in the world, surpassing the Olympic Games. The most prestigious competition in European club football is the UEFA Champions League, which attracts an extensive television audience worldwide. The final of the men's Champions League is the most-watched annual sporting event in the world.