NEW YORK, NEW YORK - AUGUST 31: Michael Mmoh of the United States returns a shot against John Isner of the United States during their Men's Singles Second Round match on Day Four of the 2023 US Open at the USTA Billie Jean King National Tennis Center at USTA Billie Jean King National Tennis Center on August 31, 2023 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
