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Germany's Angelique Kerber is congratulated by Germany's Annika Beck (R) following her win in their women's singles game on day eight of the 2016 Australian Open tennis tournament in Melbourne on January 25, 2016. AFP PHOTO / SAEED KHAN -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / SAEED KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)

Germany's Angelique Kerber is congratulated by Germany's Annika Beck (R) following her win in their women's singles game on day eight of the 2016 Australian Open tennis tournament in Melbourne on January 25, 2016. AFP PHOTO / SAEED KHAN   -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / SAEED KHAN        (Photo credit should read SAEED KHAN/AFP/Getty Images)