NEW YORK, NY - SEPTEMBER 04: Kristie Ahn of the United States returns a shot against Hayley Carter of the United States during their women's Collegiate Invitational quarterfinal match on Day Eleven of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 4, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Mike Stobe/Getty Images for USTA)
