A trainer works on the foot of Novak Djokovic of Serbia while playing Stan Wawrinka of Switzerland during their 2016 US Open men's final match at the USTA Billie Jean King National Tennis Center in New York on September 11, 2016. / AFP / Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
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AFP TIMOTHY A. CLARY