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NEW YORK, NEW YORK - SEPTEMBER 06: Alejandro Davidovich Fokina of Spain serves the ball during his Men's Singles fourth round match against Alexander Zverev of Germany on Day Seven of the 2020 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2020 in the Queens borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 06: Alejandro Davidovich Fokina of Spain serves the ball during his Men's Singles fourth round match against Alexander Zverev of Germany on Day Seven of the 2020 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2020 in the Queens borough of New York City. (Photo by Al Bello/Getty Images)