PERTH, AUSTRALIA - JANUARY 07: John Isner of Team USA reaches for the ball his match vs Team Italy during day five of the ATP Cup Group Stage at RAC Arena on January 07, 2020 in Perth, Australia. (Photo by Daniel Carson/Getty Images)
PERTH, AUSTRALIA - JANUARY 07: John Isner of Team USA reaches for the ball his match vs Team Italy during day five of the ATP Cup Group Stage at RAC Arena on January 07, 2020 in Perth, Australia. (Photo by Daniel Carson/Getty Images)