Marseille coach Gattuso has revealed that he has spoken to his former Italy team-mate as he hit out at the culprits.
He told reporters: "Fabio Grosso could’ve lost an eye. We talked on Monday in a video call and he was already on his way to training.
"I am sorry this happened, because we have an incredible rapport, we shared something amazing together as players and were preparing for an incredible night of football together on Sunday.
"There were 65,000 people in the stadium, families together, some had even arrived from Belgium for the game. I saw children in tears and the majority of our fans were angry. None of them feel represented by three or four people who ruined a day of celebration."
He added: "I spoke to Fabio about how lucky he was, because if that had struck him in the eye, he could’ve lost it. At the end of the day, he was actually fortunate in the circumstances."