NEW YORK, NY - AUGUST 25:  Jelena Jankovic of Serbia reacts against Bojana Jovanovski of Serbia during her women's singles first round match on Day One of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 25, 2014  in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Elsa/Getty Images)