NEW YORK, NY - SEPTEMBER 04: Roger Federer of Switzerland celebrates after defeating Gael Monfils of France during their men's singles quarterfinal match on Day Eleven of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Federer defeated Monfils in five sets 4-6, 3-6, 6-4, 7-5, 6-2. (Photo by Elsa/Getty Images)
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