The outspoken defender has accused the former AC Milan player and coach, who was at the helm of the Nerazzurri just over six months, of having no love for the club
Leonardo was appointed Nerazzurri boss in December 2010 following the dismissal of Rafael Benitez and led the club to the Coppa Italia and second place in Serie A before stepping down the following summer to link up with Paris Saint-Germain.
However, Materazzi, whose departure coincided with that of Leonardo, has nothing nice to say about his former boss and intimated that he might have played a role in the former AC Milan coach's exit.
“I helped him out a lot, but after he stabbed me in the back two or three times, I uncovered him," the former Italy international stated on his Twitter page.
When asked by one of his followers how he would feel about Leonardo returning to San Siro, Materazzi replied: "Over my dead body! 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!"
Materazzi, who was capped 41 times by his country, spent ten years at Appiano Gentile after arriving from Perugia in 2001.