PERTH, AUSTRALIA - JANUARY 03: Karen Khachanov of Team Russia sets for a forehand return during day one of the 2020 ATP Cup Group Stage at RAC Arena on January 03, 2020 in Perth, Australia. (Photo by Daniel Carson/Getty Images)
PERTH, AUSTRALIA - JANUARY 03: Karen Khachanov of Team Russia sets for a forehand return during day one of the 2020 ATP Cup Group Stage at RAC Arena on January 03, 2020 in Perth, Australia. (Photo by Daniel Carson/Getty Images)