AC Milan chief Marco Fassone has slammed the agent of Gigio Donnarumma.

Fassone feels Mino Raiola is costing the club millions in their contract row with the young goalkeeper.

"By going on as he has, Raiola has damaged Milan to the tune of 100 million euros," Fassone said to Corriere della Sera.

"What Madrid will not pay me will go to his pockets, but I would have invested in Italian football. "

Fassone denied that Milan threatened to leave Donnarumma in the stands all season if he did not renew.

"The club believes that the player is non-transferable, so he will play for Milan next season," he continued.

"Week after week too because, for me, it's possible for him to play every game as well.

"We can't risk a player just running down his contract, and maybe he is thinking about Real Madrid because should have a goalkeeper in perfect mental and physical condition."

Though it appears the players mind is made up, Fassone is confident that there will be a miracle, and Donnarumma reverses his decision.

"As a club, we will think of a thousand ways to keep him in," he said.

"And if he changed his mind, we would welcome him with open arms, the supporters too."