Victoria Duval of the United States reacts after upsetting No. 11 seed Samantha Stosur of Australia during their match on the second day of the 2013 US Open Tennis Championship in New York.
EPA
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Sara Errani of Italy returns a shot against Olivia Rogowska of Australia.
AP
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Novak Djokovic, of Serbia, reacts following a shot by Ricardas Berankis, of Lithuania.
AP
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Fans shade themselves from the sun while watching a match at the 2013 U.S. Open.
AP
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Svetlana Kuznetsova of Russia follows through with a serve against Mallory Burdettte of the United States.
AP
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Caroline Wozniacki of Denmark celebrates a point during her women’s singles first round match against Ying-Ying Duan of China.
Getty Images
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Simona Halep of Romania hits a return to Heather Watson of Great Britain.
EPA
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Roger Federer of Switzerland returns a shot to Grega Zemlja of Slovenia.
AFP/Getty Images
