
The U.S. Tennis Association says Thursday that del Potro "is expected" to compete at the hard-court major championship, which begins Aug. 30.
All top 98 men in the rankings are on the entry list, led by No. 1 Rafael Nadal, who will try to complete a career Grand Slam by adding a U.S. Open title to his five French Opens, two Wimbledons and one Australian Open.
Del Potro won his first Grand Slam title by beating five-time U.S. Open champion Roger Federer in the 2009 final. The Argentine has played one tournament in 2010, the Australian Open.