The forward was booked for his celebration, became involved in an angry altercation with Cagliari players shortly afterwards and had to be calmed down by team mate Kaka.
"Supermario" has already served a three-match ban this season for insulting match officials and being sent off at the end of a match at home to Napoli.
If he is banned again, he could fall foul of Italy coach Cesare Prandelli's code of ethics and find himself dropped from their next match.
(Reporting by Brian Homewood; editing by Martyn Herman)
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