Roger Federer was knocked out of the U.S. Open on Wednesday when he lost a quarter-final thriller to Tomas Berdych just hours after his old rival Andy Roddick bid a tearful farewell to his tennis career. Federer was unable to conjure up any of his old magic as Berdych stormed to a surprise victory, 7-6 6-4 3-6 6-3, handing the world number one his earliest exit from Flushing Meadows in nine years. Roddick made his final appearance at Arthur Ashe Stadium when he lost to Juan Martin del Potro in the fourth round, while Andy Murray and Maria Sharapova both dug themselves out of trouble to stay alive on a drama-charged day at the last grand slam of the year. – Photos by AFP