NEW YORK, NY - SEPTEMBER 6: Eugenie Bouchard of Canada walks slowly to her car after withdrawing from the US Open due to a concussion she suffered two days before by slipping in the locker room during the 2015 US Open at USTA Billie Jean King National Tennis Center on September 6, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Jean Catuffe/Getty Images)
