** FILE ** Andre Agassi, of Las Vegas, Nev., returns the ball to Todd Martin, of Ponte Vedra Beach, Fla., during the U.S. Open men's singles championship in New York Sunday, Sept. 12, 1999. Turning what was expected to be a routine pre-Wimbledon news conference into something significant, Agassi announced Saturday, June 24, 2006, he will retire after this year's U.S. Open, leaving tennis after two decades. (AP Photo/Kathy Willens,file)