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MELBOURNE, AUSTRALIA - FEBRUARY 03: Tommy Paul of The United States of America plays a forehand in his Men's Singles 2nd round match against Alexei Popyrin of Australia during day three of the ATP 250 Murray River Open at Melbourne Park on February 03, 2021 in Melbourne, Australia. (Photo by Jack Thomas/Getty Images)

MELBOURNE, AUSTRALIA - FEBRUARY 03: Tommy Paul of The United States of America plays a forehand in his Men's Singles 2nd round match against Alexei Popyrin of Australia during day three of the ATP 250 Murray River Open at Melbourne Park on February 03, 2021 in Melbourne, Australia. (Photo by Jack Thomas/Getty Images)