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Marathon man Isner quits Wimbledon after injury

US player John Isner (C) receives attention to his knee after suffering an injury after two games during his second round match against France's Adrian Mannarino at the Wimbledon Championships in southwest London on June 26, 2013. Isner, who played in theWimbledon marathon man John Isner, who played in the longest match in history at the All England Club in 2010, was forced to quit his second round match after just two games on Tuesday.