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PARIS, FRANCE - SEPTEMBER 30: John Isner of the United States plays a backhand during his Men's Singles second round match against Sebastian Korda of The United States of America on day four of the 2020 French Open at Roland Garros on September 30, 2020 in Paris, France. (Photo by Clive Brunskill/Getty Images)

PARIS, FRANCE - SEPTEMBER 30: John Isner of the United States plays a backhand during his Men's Singles second round match against Sebastian Korda of The United States of America on day four of the 2020 French Open at Roland Garros on September 30, 2020 in Paris, France. (Photo by Clive Brunskill/Getty Images)