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Rafael Nadal of Spain's girlfriend Xisca Perello poses with his sister Isabel Nadal before his 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 Matthew Stockman/Getty Images)