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Caroline Wozniacki, of Denmark, serves against Peng Shuai, of China, during the semifinals of the 2014 U.S. Open tennis tournament, Friday, Sept. 5, 2014, in New York. (AP Photo/Mike Groll)

Best of the 2014 U.S. Open

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Highlights from the 2014 U.S. Open tennis tournament in New York.