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MELBOURNE, AUSTRALIA - JANUARY 14: Milos Raonic of Canada serves in his Men’s Singles match against Kwon Soon-woo of Korea during day one of the 2020 Kooyong Classic at Kooyong on January 14, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 14: Milos Raonic of Canada serves in his Men’s Singles match against Kwon Soon-woo of Korea during day one of the 2020 Kooyong Classic at Kooyong on January 14, 2020 in Melbourne, Australia. (Photo by Mike Owen/Getty Images)