After a protracted saga appeared to be settled in the offseason by Donnarumma signing a contract until 2021, speculation over his future has started again and supporters have had enough.
The Serie A side's ultras targeted 18-year-old Gianluigi Donnarumma with a banner referencing the 18-year-old keeper's ongoing contract dispute.
Psychological violence by giving you €6million a season and signing your parasite brother?
And Gattuso told Rai Sport: "He's an 18-year-old kid, of course he was shaken".
He was comforted by Leonardo Bonucci as seen in this short clip... For his age, he's the best goalkeeper in the world right now.
One of the lawyers and advisers of Mino Raiola have informed Milan legal services of the intention to request the nullity of the contract for moral violence, the Italian newspaper said.
"Gigio is very young". It is clear that selling Donnarumma could be a potentially disastrous for Il Diavolo.
"We must protect him, as we know where the rot is coming from".
"I'm sorry to say it, but if I were in the Curva at San Siro tonight, I'd whistle Donnarumma", he wrote on Twitter.
Mirabelli added: "I have no meeting planned with Raiola". "There's a man who is trying to damage our image but he is becoming more a showman than anything else. We can laugh it off, but won't let him get away with it".
Gigio is an exceptional lad, I spoke to him a few minutes ago and he never said he wanted to leave. Perhaps there is a gentleman who wants to organise something, but we will look out for Milan's interests in every arena.
He has made four senior Italy appearances and is likely to take over as the No. 1 after Gianluigi Buffon retired from global duty following the Azzurri's failure to qualify for the 2018 World Cup.