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MELBOURNE, AUSTRALIA - JANUARY 30: Australian Open runner-up Serena Williams of the United States speaks on stage after losing the Women's Singles Final to Angelique Kerber of Germany on day 13 of the 2016 Australian Open at Melbourne Park on January 30, 2016 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 30:  Australian Open runner-up Serena Williams of the United States speaks on stage after losing the Women's Singles Final to Angelique Kerber of Germany on day 13 of the 2016 Australian Open at Melbourne Park on January 30, 2016 in Melbourne, Australia.  (Photo by Michael Dodge/Getty Images)