NEW YORK, NY - SEPTEMBER 07: Caroline Wozniacki of Denmark looks on against Serena Williams of the United States during their women's singles final match on Day fourteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 7, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Alex Goodlett/Getty Images)
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