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MASON, OHIO - AUGUST 19: John Isner of the United States serves against Stefanos Tsitsipas of Greece during their Men's Singles Quarterfinal match on day seven of the Western & Southern Open at Lindner Family Tennis Center on August 19, 2022 in Mason, Ohio. (Photo by Dylan Buell/Getty Images)

MASON, OHIO - AUGUST 19: John Isner of the United States serves against Stefanos Tsitsipas of Greece during their Men's Singles Quarterfinal match on day seven of the Western & Southern Open at Lindner Family Tennis Center on August 19, 2022 in Mason, Ohio. (Photo by Dylan Buell/Getty Images)