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1. FC Köln was the German club where Petit played. The French midfielder joined the Bundesliga side in 2000 after a successful spell with Arsenal. He spent two seasons with Köln, making 53 appearances and scoring 10 goals. Petit's time in Germany was marked by both success and controversy, as he helped the club reach the UEFA Cup semi-finals in 2002 but also clashed with the club's management.