Zinedine Zidane's headbutt on Marco Materazzi was "provoked" by a comment from the Italy defender, according to the player's agent.
And, while Alain Migliaccio did not know what Materazzi said, he confirmed that Zidane would reveal all soon.
"He was very sad for everything that happened but this is life," Migliaccio told Radio Five Live. "He is a human being not a god. I know Zizou (Zidane) well and even though he hasn't told me exactly what Materazzi said, I know that he was provoked."
He continued: "Materazzi said something very grave to him, I don't know what it was.
"I know Zizou well and he will not reveal what Materazzi said to him but he will in one or two days' time explain why he had such a reaction.
"When he is calmer he will speak.
"When I saw him at 2am he was very sad, he didn't want to end his career like this.
"He was simply very sad.
"He is a person that doesn't say much but bottles it up and then one day explodes." | 
