Marco Materazzi hopes Italian Prime Minister Silvio Berlusconi saw the funny side of the Internazionale defender wearing a mask of the AC Milan owner at the end of Milan derby.

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Serie A leaders Inter beat second-placed Milan 2-0 despite being reduced to nine men, prompting non-playing substitute Materazzi to don the rubber mask and charge onto the field in celebration at fulltime.

"As always, whatever Materazzi does gets discussed. Even a carnival mask, which is sold everywhere. There was no intent to cause controversy, no wish to offend, no political implication," the 36-year-old said.

"I'm sure that Berlusconi, as president of Milan and above all as a person with great self-irony..., will have smiled seeing me."

Italian Materazzi, headbutted by France's Zinedine Zidane in the 2006 World Cup final, could face a sanction from the league on Tuesday when disciplinary measures from the weekend games are announced.

The centre back has barely figured in the last two years under Inter coach Jose Mourinho but continues to stay in the limelight, saying recently he would go on a motorhome trip around America in June rather than watch this year's World Cup.