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Germany's Angelique Kerber holds The Daphne Akhurst Memorial Cup as she celebrates after victory in her women's singles final match against Serena Williams of the US on day thirteen of the 2016 Australian Open tennis tournament in Melbourne on January 30, 2016. AFP PHOTO / SAEED KHAN / AFP / SAEED KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)

Germany's Angelique Kerber holds The Daphne Akhurst Memorial Cup as she celebrates after victory in her women's singles final match against Serena Williams of the US on day thirteen of the 2016 Australian Open tennis tournament in Melbourne on January 30, 2016. AFP PHOTO / SAEED KHAN / AFP / SAEED KHAN        (Photo credit should read SAEED KHAN/AFP/Getty Images)