A controversial and provocative figure in football, he was known for his very physical and aggressive style of play as a defender, as well as his tight marking and strong, harsh tackling, which led him to receive more than 60 yellow cards and 25 red cards throughout his playing career. Due to his temper and his heavy challenges, he has been involved in several altercations with other players during matches, drawing comparisons with retired defender Pasquale Bruno. "The Times" placed Materazzi at number 45 in their list of the 50 hardest footballers in history.