Top-ranked Novak Djokovic, and past U.S. Open champions Roger Federer and Rafael Nadal head men's field for the year’s last Grand Slam tournament.

Djokovic is 48-1 in singles matches, with eight titles in 2011, including at Wimbledon and the Australia Open. He’s a two-time runner-up at the U.S. Open, losing to Federer in the 2007 final and to Nadal last year.

The top 101 best men in the ATP rankings received direct entry into the provisional field nnounced Thursday by the U.S. Tennis Association. Three players used special protected rankings to get into the draw: Fernando Gonzalez, Tommy Haas and Ivo Karlovic.

U.S. Open begins Aug. 29 in New York.