NEW YORK, NY - AUGUST 31:  Casey Dellacqua of Australia returns a shot against Anett Kontaveit of Estonia during her Women's Singles First Round match during Day One of the 2015 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2015 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Elsa/Getty Images)