Defender (association football)
In the sport of association football, a defender is an outfield player whose primary role is to stop attacks during the game and prevent the opposition from scoring.
England women's captain Leah Williamson (left) defends for Arsenal.
Centre-back John Terry (right) closely marks centre-forward Didier Drogba.
Edwin van der Sar, pictured playing for Manchester United during the 2010–11 season, is considered to be one of the pioneers of the sweeper-keeper role.
Paolo Maldini marking a player during a friendly match.
Association football, commonly known as football, or soccer, is a team sport played between two teams of 11 players each, 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 opposing team by moving the ball beyond the goal line into a rectangular-framed goal defended by the opposing team. 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.
The attacking player (No. 10) attempts to kick the ball into the net behind the opposing team's goalkeeper (here wearing red and yellow) to score a goal.
An early draft of the original hand-written 'Laws of the Game' drawn up on behalf of The Football Association by Ebenezer Cobb Morley in 1863 on display at the National Football Museum, Manchester, England
The Aston Villa team in 1897, after winning both the FA Cup and the English Football League
North team of the British Ladies', the first organised women's football team, here pictured in March 1895