Leonardo is being linked with a return to Inter this summer.
"A return to Inter with Leonardo? Over my dead body!" wrote Matrix on his Twitter account. "We are very different. I am real, he isn't... besides I love Inter, he doesn't... it's not a small detail, you know.
"I said the exact same things to his face. I never talk about someone behind their back. Never!"
Some comments came in from other Tweeters arguing Leonardo's case, which only further irritated Materazzi.
"I helped him out a lot, but after he stabbed me in the back two or three times, I uncovered him!"