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MELBOURNE, VICTORIA - JANUARY 30: In this handout photo provided by Tennis Australia, Angelique Kerber of Germany poses with the Daphne Akhurst Trophy after winning her Women's Singles Final match 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 Fiona Hamilton/Tennis Australia via Getty Images)

MELBOURNE, VICTORIA - JANUARY 30:  In this handout photo provided by Tennis Australia, Angelique Kerber of Germany poses with the Daphne Akhurst Trophy after winning her Women's Singles Final match 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 Fiona Hamilton/Tennis Australia via Getty Images)