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LONDON, ENGLAND - JULY 07: Angelique Kerber of Germany in action during her semi final match against Venus Williams of USA at Wimbledon on July 7, 2016 in London, England. (Photo by Visionhaus/Corbis via Getty Images)

LONDON, ENGLAND - JULY 07: Angelique Kerber of Germany in action during her semi final match against Venus Williams of USA at Wimbledon on July 7, 2016 in London, England. (Photo by Visionhaus/Corbis via Getty Images)