NEW YORK, NY - SEPTEMBER 14: Novak Djokovic of Serbia, the 2015 US Open Men's Singles champion, poses with the winner's trophy in Central Park on September 14, 2015 in New York City. (Photo by Chris Trotman/Getty Images for ATP)
NEW YORK, NY - SEPTEMBER 14: Novak Djokovic of Serbia, the 2015 US Open Men's Singles champion, poses with the winner's trophy in Central Park on September 14, 2015 in New York City. (Photo by Chris Trotman/Getty Images for ATP)