Ninth-seeded Gilles Simon of France has retired from his third-round U.S. Open match against No. 24 Juan Carlos Ferrero of Spain because of a right knee injury. Simon stopped playing while trailing 1-6, 6-4, 7-6 (5), 1-0 Sunday. Ferrero moved into the fourth round at Flushing Meadows for the first time since reaching the 2003 final. More...