NEW YORK, NY - SEPTEMBER 09: Rafael Nadal of Spain celebrates victory as Novak Djokovic of Serbia walks back to his chair after their men's singles final match against Novak Djokovic of Serbia on Day Fifteen of the 2013 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
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