NEW YORK, NY - SEPTEMBER 02: Rafael Nadal of Spain serves against Diego Schwartzman of Argentina during their Men's Singles Second Round match on Day Three of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 2, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Clive Brunskill/Getty Images)
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