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NEW YORK, USA - SEPTEMBER 10: Angelique Kerber (C) of Germany celebrates her victory after the match against Karolina Pliskova (not seen) of the Czech Republic within the Women's Singles Final on Day Thirteen of the 2016 US Open at the USTA Billie Jean King National Tennis Center in New York City, NY, United States on September 10, 2016. (Photo by Volkan Furuncu/Anadolu Agency/Getty Images)

NEW YORK, USA - SEPTEMBER 10: Angelique Kerber (C) of Germany celebrates her victory after the match against Karolina Pliskova (not seen) of the Czech Republic within the Women's Singles Final on Day Thirteen of the 2016 US Open at the USTA Billie Jean King National Tennis Center in New York City, NY, United States on September 10, 2016. (Photo by Volkan Furuncu/Anadolu Agency/Getty Images)