Rafael Nadal of Spain returns a shot from Bjorn Phau of Germany during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS
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Serena Williams of the U.S. hits a return shot to Kateryna Bondarenko of Russia during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS
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Venus Williams of the US watches her return to Samantha Stosur of Australia during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS
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Venus Williams of the U.S. hits a return to Samantha Stosur of Australia during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS
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Roger Federer of Switzerland hits a return to Maximo Gonzalez of Argentina during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS
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Maximo Gonzalez of Argentina hits a return shot to Roger Federer of Switzerland during their match at the U.S. Open tennis tournament in Flushing Meadows, New York. Photo/REUTERS