MADRID, Sept 28 (Reuters) - Spain's Anti-violence Commission has asked football authorities to open a disciplinary inquiry into Alaves president Dimitry Piterman after he accused Ronaldo and two of his Real Madrid team mates of behaving like clowns.Piterman slammed the behaviour of Ronaldo and his fellow Brazilians Robinho and Roberto Carlos after the striker's two goals in Real's 3-0 Primera Liga victory at Alaves on Sunday. Ronaldo dived to the ground after his goals and lay on his back waving his arms and legs in the air in what he calls his 'cockroach' celebration as Robinho and Roberto Carlos joined in. 'It may have been funny for them to pretend to be cockroaches dressed in white but they looked ridiculous,' Piterman said on Monday. 'If they were Alaves players I would have their heads examined. They acted like circus clowns.' Ronaldo said the celebration was part of a bet with his media representative and a journalist who said they would go to a restaurant dressed as women if he dared to pull the stunt. Piterman, a Ukrainian-born American entrepreneur, has had a number of run-ins with the football authorities in the past. The Spanish Football Federation opened an investigation into his behaviour in January 2003 when he was president of Racing Santander for coaching from the side of the pitch after acquiring an accreditation as a photographer. He then registered himself as the club's kit man so he could sit in the dug-out and shout instructions to his team.