NEW YORK, NY - AUGUST 29:  Mirjana Lucic-Baroni of Croatia serves to Simona Halep of Romania during their women's singles third round match on Day Five of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 29, 2014 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Matthew Stockman/Getty Images)