Matthias Sammer
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Matthias Sammer is a German football official and former player and coach. He played as a defensive midfielder and later in his career as a sweeper.
Sammer in 2013
Sammer with Dresden in 1990, holding the FDGB-Pokal trophy
Sammer (back row, third from right) in 1986, with the East German football team
Sammer in 1990
Defender (association football)
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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.