"I wasn't expecting it in that moment. I was lucky enough that the whole episode took me by surprise because if I had expected something like that to happen and had been ready for it, I'm sure both of us would have ended up being sent off," Materazzi said.
"There had been a bit of contact between us in the area. He had scored France's goal in the first half and our coach (Marcello Lippi) told me to mark him. After that first brush between us, I apologised but he reacted badly," he added recalled.
"The late tackles, altercations and exchanges continued until 110 minutes, when things reached a head.
"After the third clash, I frowned and he retorted: 'I'll give you my shirt later'. I replied that I'd rather have his sister than his shirt."
Materazzi, who equalised for Italy after Zidane opened the scoring in the first half, then scored Italy's second goal in the shootout before France's David Trezeguet missed what proved to be the deciding penalty.