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MELBOURNE, AUSTRALIA - JANUARY 15: Jo-Wilfried Tsonga of France serves in his first round match against Martin Klizan of Slovakia during day two of the 2019 Australian Open at Melbourne Park on January 15, 2019 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 15:  Jo-Wilfried Tsonga of France serves in his first round match against Martin Klizan of Slovakia during day two of the 2019 Australian Open at Melbourne Park on January 15, 2019 in Melbourne, Australia.  (Photo by Michael Dodge/Getty Images)