TOPSHOT - US player Serena Williams celebrates winning the first set against Germany's Angelique Kerber during the women's singles final on the thirteenth day of the 2016 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 9, 2016. / AFP / JUSTIN TALLIS / RESTRICTED TO EDITORIAL USE (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

TOPSHOT - US player Serena Williams celebrates winning the first set against Germany's Angelique Kerber during the women's singles final on the thirteenth day of the 2016 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 9, 2016. / AFP / JUSTIN TALLIS / RESTRICTED TO EDITORIAL USE        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)