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BRISBANE, AUSTRALIA - JANUARY 06: Garbine Muguruza of Spain plays a backhand in her match against Varvara Lepchenko of the USA during day four of the 2016 Brisbane International at Pat Rafter Arena on January 6, 2016 in Brisbane, Australia. (Photo by Chris Hyde/Getty Images)

BRISBANE, AUSTRALIA - JANUARY 06:  Garbine Muguruza of Spain plays a backhand in her match against Varvara Lepchenko of the USA during day four of the 2016 Brisbane International at Pat Rafter Arena on January 6, 2016 in Brisbane, Australia.  (Photo by Chris Hyde/Getty Images)