UNITED STATES - SEPTEMBER 09: From left, Roger Federer of Switzerland, former tennis player Guillermo Vilas of Argentina, and Novak Djokovic of Serbia pose before the U.S. Open men's singles final match between Federer and Djokovic on day fourteen of the U.S. Open at the Billie Jean King National Tennis Center in New York, U.S., Sunday, Sept. 9, 2007. Federer won the match 7-6 (7-4), 7-6 (7-2), 6-4. (Photo by Andrew Harrer/Bloomberg via Getty Images)
