In an interview with French daily Le Parisien this week Domenech alluded to "a referee being bought" during a tie between France and Italy's under-21 sides in 1999. Domenech was coach of the French team at the time.

But European football boss Platini insisted that his countryman would be charged with unsporting behaviour if he does not back up his allegations.

"We're going to send a letter to the French federation so that Mr Domenech provides us with proof of what he says, and if there is no proof we will penalize him," warned Platini.