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MELBOURNE, AUSTRALIA - JANUARY 18: Maria Sharapova of Russia plays a backhand in her third round match against Caroline Wozniacki of Denmark during day five of the 2019 Australian Open at Melbourne Park on January 18, 2019 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 18:  Maria Sharapova of Russia plays a backhand in her third round match against Caroline Wozniacki of Denmark during day five of the 2019 Australian Open at Melbourne Park on January 18, 2019 in Melbourne, Australia.  (Photo by Scott Barbour/Getty Images)