NEW YORK, NY - SEPTEMBER 05: Olga Danilovic of Serbia returns a shot against Lea Boskovic of Croatia during her Junior Girls' Singles second round match on Day Nine of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 5, 2017 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
