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MELBOURNE, AUSTRALIA - JANUARY 27: Caroline Wozniacki of Denmark plays a backhand in her women's singles final against Simona Halep of Romania on day 13 of the 2018 Australian Open at Melbourne Park on January 27, 2018 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 27:  Caroline Wozniacki of Denmark plays a backhand in her women's singles final against Simona Halep of Romania on day 13 of the 2018 Australian Open at Melbourne Park on January 27, 2018 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)