AC Milan ultras have left anti-Donnarumma banners outside the club's Milanello training centre.
Fans are still angry over the way goalkeeper Gigio Donnarumma quit Milan for PSG in a free transfer over the summer.
On Sunday, a group of ultras unveiled two banners outside Milanello, before the Rossoneri's game against Cagliari.
'We don't forget traitors, be careful when you will be back in Milan,' they wrote in one of those, while the second one read: “Donnarumma ungrateful bast… you suck more than Leonardo.'
The Italian is waiting to make his debut for PSG.