SYDNEY, AUSTRALIA - JANUARY 09: Reilly Opelka (USA) hits a backhand at The Sydney International Tennis on January 09, 2018, at Sydney Olympic Park Tennis Centre in Homebush, Australia. (Photo by Speed Media/Icon Sportswire via Getty Images)
SYDNEY, AUSTRALIA - JANUARY 09: Reilly Opelka (USA) hits a backhand at The Sydney International Tennis on January 09, 2018, at Sydney Olympic Park Tennis Centre in Homebush, Australia. (Photo by Speed Media/Icon Sportswire via Getty Images)