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Association football, more commonly known as football or soccer, is a team sport played between two teams of eleven players, and is widely considered to be the most popular sport in the world.
- ↑ Guttman, Allen . "The Diffusion of Sports and the Problem of Cultural Imperialism" Eric Dunning, Joseph A. Maguire, Robert E. Pearton The Sports Process: A Comparative and Developmental Approach, p129, Champaign: Human Kinetics. URL accessed 2008-01-26. "the game is complex enough not to be invented independently by many preliterate cultures and yet simple enough to become the world's most popular team sport"
- ↑ Dunning, Eric . "The development of soccer as a world game" Sport Matters: Sociological Studies of Sport, Violence and Civilisation, p103, London: Routledge. URL accessed 2008-01-26. "During the twentieth century, soccer emerged as the world's most popular team sport"
- ↑ Frederick O. Mueller, Robert C. Cantu, Steven P. Van Camp . "Team Sports" Catastrophic Injuries in High School and College Sports, p57, Champaign: Human Kinetics. URL accessed 2008-01-26. "Soccer is the most popular sport in the world, and its popularity is growing in the United States. It has been estimated that there were 22 million soccer players in the world in the early 1980s, and that number is increasing."