Saisai Zheng Pictures
NEW YORK, NY - AUGUST 27: Saisai Zheng of China returns the ball during her ladies singles first round match against Garbine Muguruza of Spain on Day One of the 2018 US Open at the USTA Billie Jean King National Tennis Center on August 27, 2017 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)