2016 U.S. Open Tennis Tournament. New York. USA. [Getty Images]

2016 U.S. Open - Day 14 US Open women's singles champion Angelique Kerber with the WTA Wold Number One trophy at the Unisphere on day fourteen of the 2016 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 11, 2016 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)

Corbis Sport Tim Clayton - Corbis