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epa02329592 Novak Djokovic of Serbia reaches for a return to Roger Federer of Switzerland (not pictured) during their semifinal round match at the 2010 US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 11 September 2010. The US Open Championship runs through 12 September when the men's final is scheduled to be played. EPA/JOHN G. MABANGLO