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MELBOURNE, AUSTRALIA - JANUARY 26: Tennys Sandgren of the United States celebrates after winning set point during his Men's Singles fourth round match against Fabio Fognini of Italy on day seven of the 2020 Australian Open at Melbourne Park on January 26, 2020 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 26: Tennys Sandgren of the United States celebrates after winning set point during his Men's Singles fourth round match against Fabio Fognini of Italy on day seven of the 2020 Australian Open at Melbourne Park on January 26, 2020 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)