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MELBOURNE, AUSTRALIA - JANUARY 18: Alison Riske of the United States plays a backhand in her first round match against Belinda Bencic of Switzerland during day one of the 2016 Australian Open at Melbourne Park on January 18, 2016 in Melbourne, Australia. (Photo by Darrian Traynor/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 18:  Alison Riske of the United States plays a backhand in her first round match against Belinda Bencic of Switzerland during day one of the 2016 Australian Open at Melbourne Park on January 18, 2016 in Melbourne, Australia.  (Photo by Darrian Traynor/Getty Images)