Donnarumma was barracked by home fans as reports emerged over the day that he was pushing to have his Milan deal canceled.
“It was an ugly night that I didn't expect!" wrote Donnarumma on Instagram.
“I never said, nor wrote, that I was on the end of moral violence when I signed the contract. Despite all of this, I look ahead with my mind on the next game… Forza Milan!"
There had been reports Donnarumma's agent Mino Raiola sent Milan's lawyers a letter attempting to void the contract signed over the summer, suggesting he was under psychological pressure and “moral violence" by the club.