Marco Materazzi has revealed what he said to Zinedine Zidane in the 2006 World Cup final on the 10th anniversary of the infamous head-butt.
Materazzi and Italy went on to win the decider 5-3 in a penalty shoot-out after France captain Zidane was sent off in extra time, in what was the last act of his professional playing career.
The now Real Madrid coach turned around and head-butted Materazzi after the Italian defender provoked him with inflammatory words.
Media reports suggested Materazzi had insulted Zidane's mother, but the 42-year-old insists that was not the case.
"What I said was stupid," Materazzi said. "But it didn't deserve that reaction.
"You would hear stronger words said on the streets of Naples, or Milan, or Paris, much more serious things.
"My mother died when I was 15, so I would never have insulted his.
"I spoke about his sister."

Spoke about his sister? Well, I believ professional footballers hav mind trainers. Yet some players trick other players by provocation into committing offences dat could sho dem d way out. Leaders esp should hav limitless self control. Dat zidane was always my hero play maker but he f--kd up bigtime dat day...I don't enjoy watching his game anymore for dat sake...d spirit just went dead since then. Don't know y. I naturaly hate leaders who lead wid loose tempers!

I supported Zidane's action, and still do. He's a naturally calm and friendly player and I knew for him to have done that, Materazzi must have said something very bad, like sexually related insults to his mother or girlfriend. It's just as bad that it turned out to be his sister.

Today Zidane is coach of the biggest football club in the world, with a Champions league trophy, where is Materazzi?