Brussels - French Open organizers have filed a lawsuit in a bid to ban online gambling companies from offering bets on the Grand Slam tournament. The complaint filed Friday in courts in Liege in eastern Belgium and in Paris claims that Internet betting companies stain the reputation of the clay-court championship at Roland Garros. "There is urgency to act because sporting ethic is at risk," Jean-Francois Vilotte, director general of the French tennis federation, told The Associated Press.