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Stan Wawrinka of Switzerland (L) meets Daniel Evans of the United Kingdom following their US Open 2016 men's single match at the USTA Billie Jean King National Tennis Center in New York on September 3, 2016. / AFP / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP via Getty Images)

Stan Wawrinka of Switzerland (L) meets Daniel Evans of the United Kingdom following their US Open 2016 men's single match at the USTA Billie Jean King National Tennis Center in New York on September 3, 2016. / AFP / TIMOTHY A. CLARY        (Photo credit should read TIMOTHY A. CLARY/AFP via Getty Images)