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MELBOURNE, AUSTRALIA - JANUARY 30: Angelique Kerber of Germany celebrates winning the Women's Singles Final against Serena Williams of the United States during day 13 of the 2016 Australian Open at Melbourne Park on January 30, 2016 in Melbourne, Australia. (Photo by Daniel Pockett/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 30:  Angelique Kerber of Germany celebrates winning the Women's Singles Final against Serena Williams of the United States during day 13 of the 2016 Australian Open at Melbourne Park on January 30, 2016 in Melbourne, Australia.  (Photo by Daniel Pockett/Getty Images)