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LONDON, ENGLAND - JULY 09: Angelique Kerber of Germany plays a forehand during the Ladies Singles Final against Serena Williams of The United States on day twelve of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 9, 2016 in London, England. (Photo by Julian Finney/Getty Images)

LONDON, ENGLAND - JULY 09:  Angelique Kerber of Germany plays a forehand during the Ladies Singles Final against Serena Williams of The United States on day twelve of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 9, 2016 in London, England.  (Photo by Julian Finney/Getty Images)