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MELBOURNE, AUSTRALIA - JANUARY 15: Marin Clinic of Croatia plays a backhand in his Men’s Singles match against Kwon Soon-woo of Korea during day two of the 2020 Kooyong Classic at Kooyong on January 15, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 15: Marin Clinic of Croatia plays a backhand in his Men’s Singles match against Kwon Soon-woo of Korea during day two of the 2020 Kooyong Classic at Kooyong on January 15, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)