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NEW YORK, NEW YORK - AUGUST 30: Dominik Koepfer of Germany returns a shot during his Men's Singles third round match against Nikoloz Basilashvili of Georgia on day five of the 2019 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2019 in Queens borough of New York City. (Photo by Elsa/Getty Images)

NEW YORK, NEW YORK - AUGUST 30:  Dominik Koepfer of Germany returns a shot during his Men's Singles third round match against Nikoloz Basilashvili of Georgia on day five of the 2019 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2019 in Queens borough of New York City. (Photo by Elsa/Getty Images)