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Kei Nishikori of Japan returns the ball against Marco Trungelliti of Argentina during their Round 1 men's Singles match at the 2019 US Open at the USTA Billie Jean King National Tennis Center in New York on August 26, 2019. (Photo by TIMOTHY A. CLARY / AFP) (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Kei Nishikori of Japan returns the ball against Marco Trungelliti of Argentina during their Round 1 men's Singles match at the 2019 US Open at the USTA Billie Jean King National Tennis Center in New York on August 26, 2019. (Photo by TIMOTHY A. CLARY / AFP)        (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)