The U.S. Open on Wednesday announced 104 of the 128 men who will compete in the final tennis Grand Slam tournament of 2013 at Flushing Meadow, N.Y.
The field is led by defending champ Andy Murray, the world's No. 2-ranked player, and five other past champions: No. 1 Novak Djokovic, No. 4 Rafael Nadal, five-time winner and No. 5 Roger Federer, No. 7 Juan Martin del Potro and Lleyton Hewitt.
Murray defeated Djokovic in the final of the 2012 U.S. Open and this month's Wimbledon. Djokovic has played in three straight U.S. Open finals, winning in 2011, and is looking for his second major title this year after winning the Australian Open.
The 104 automatic berths were awarded based on rankings. Sixteen more players will gain entry via the U.S. Open Qualifying Tournament, according to usopen.org, and the United States Tennis Association will hand out eight wild cards.
Seeding will be announced closer to play, which begin Aug. 26.