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MELBOURNE, AUSTRALIA - JANUARY 22: Grigor Dimitrov of Bulgaria plays a forehand during his Men's Singles second round match against Tommy Paul of the United States on day three of the 2020 Australian Open at Melbourne Park on January 22, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 22: Grigor Dimitrov of Bulgaria 
plays a forehand during his Men's Singles second round match against Tommy Paul of the United States on day three of the 2020 Australian Open at Melbourne Park on January 22, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)