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Novak Djokovic of Serbia reacts as he breaks the serve of Florian Mayer of Germany during their quarter-final match. (AP Photo)
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Novak Djokovic of Serbia plays a return to Florian Mayer of Germany. (AP Photo)
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Roger Federer of Switzerland plays a return to Mikhail Youzhny of Russia during their quarter-final match. (AP Photo)
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Roger Federer of Switzerland waves to spectators after defeating Mikhail Youzhny of Russia. (AP Photo)
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Britain's Prince William, right, and Kate, Duchess of Cambridge watch Roger Federer of Switzerland play Mikhail Youzhny of Russia. (AP Photo)
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Jo-Wilfried Tsonga of France plays a return to Philipp Kohlschreiber of Germany. (AP Photo)
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Jo-Wilfried Tsonga of France reacts after defeating Philipp Kohlschreiber of Germany. (AP Photo)
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Andy Murray of Britain, right, plays a shot to David Ferrer of Spain during their quarter-final match. (AP Photo)
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David Ferrer of Spain wipes his face during a quarter-final match against Andy Murray of Britain. (AP Photo)
