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MELBOURNE, AUSTRALIA - JANUARY 19: Mona Barthel of Germany plays a forehand in her first round match against Vania King of the United States during day two of the 2016 Australian Open at Melbourne Park on January 19, 2016 in Melbourne, Australia. (Photo by Zak Kaczmarek/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Mona Barthel of Germany plays a forehand in her first round match against Vania King of the United States during day two of the 2016 Australian Open at Melbourne Park on January 19, 2016 in Melbourne, Australia.  (Photo by Zak Kaczmarek/Getty Images)