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MELBOURNE, AUSTRALIA - JANUARY 21: Thiago Monteiro of Brazil plays a backhand during his Men's Singles first round match against John Isner of the United States on day two of the 2020 Australian Open at Melbourne Park on January 21, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 21: Thiago Monteiro of Brazil plays a backhand during his Men's Singles first round match against John Isner of the United States on day two of the 2020 Australian Open at Melbourne Park on January 21, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)