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BRISBANE, AUSTRALIA - JANUARY 04: Roberta Vinci of Italy plays a forehand against Jelena Jankovic of Serbia during day two of the 2016 Brisbane International at Pat Rafter Arena on January 4, 2016 in Brisbane, Australia. (Photo by Matt Roberts/Getty Images)

BRISBANE, AUSTRALIA - JANUARY 04: Roberta Vinci of Italy plays a forehand against Jelena Jankovic of Serbia during day two of the 2016 Brisbane International at Pat Rafter Arena on January 4, 2016 in Brisbane, Australia.  (Photo by Matt Roberts/Getty Images)