"If I could play one game again, it would not be Milan-Liverpool in Istanbul," he said of the Champions League Final in which they threw away a 3-0 lead in six minutes.
"We played there for 120 minutes like Gods and for six like idiots. No, I'd love to replay the 2002 game against South Korea.
"I can still see Ahn Jung Hwan's Golden Goal, my last moment in the Nazionale."
Some at Milan are still trying to convince the captain to change his mind and play on, but the dye is cast.
"I am 100 per cent going to retire. This time last year I was doubtful, but not now. Negative incidents can happen when you're 25 or 40.
"The problem is you cannot go against nature. You can push it, but at a certain point you need to give up. I still have the fire in my belly and could physically continue, but I've made my decision."