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BRISBANE, AUSTRALIA - JANUARY 06: Karolina Pliskova of the Czech Republic plays a forehand against Elina Svitolina of the Ukraine on day six of the 2017 Brisbane International at Pat Rafter Arena on January 6, 2017 in Brisbane, Australia. (Photo by Bradley Kanaris/Getty Images)

BRISBANE, AUSTRALIA - JANUARY 06:  Karolina Pliskova of the Czech Republic plays a forehand against Elina Svitolina of the Ukraine on day six of the 2017 Brisbane International at Pat Rafter Arena on January 6, 2017 in Brisbane, Australia.  (Photo by Bradley Kanaris/Getty Images)