NEW YORK, NY - SEPTEMBER 08: Angelique Kerber of Germany celebrates after defeating Caroline Wozniacki of Denmark with a score of 6-4, 6-3 in their Women's Singles Semifinal Match on Day Eleven of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Michael Reaves/Getty Images)

NEW YORK, NY - SEPTEMBER 08:  Angelique Kerber of Germany celebrates after defeating Caroline Wozniacki of Denmark with a score of 6-4, 6-3 in their Women's Singles Semifinal Match on Day Eleven of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2016 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Michael Reaves/Getty Images)