NEW YORK, NY - SEPTEMBER 07:  Serena Williams of the United States walks to the court before playing against Caroline Wozniacki of Denmark during their women's singles final match on Day Fourteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 7, 2014 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Chris Trotman/Getty Images for USTA)