PARIS -- John Isner of the United States pulled out of the French Open on Thursday because of illness.
The 114th-ranked Isner earned a wild card for Roland Garros by winning a qualifying event held by the U.S. Tennis Association. The USTA returned the wild-card slot to the French federation, which handed it to the 310th-ranked Romain Jouan of France.
Isner, who lives in Tampa, Fla., led Georgia to the 2007 NCAA tennis championship.
Tursunov hasn't played on tour since losing to Andy Roddick in the third round at Key Biscayne, Fla., in late March.
The draw for the year's second Grand Slam tournament is Friday. Play begins Sunday.