Former AC Milan manager Sinisa Mihajlovic believes goalkeeper Gianluigi Donnarumma should stay loyal to the club where he learnt his trade.
The 18-year-old was recently offered a new lucrative deal at the Rossoneri, but he has since rejected it and is now entering the final year of his contract.
A section of, presumably Milan, supporters threw fake money at Donnarumma during the Euro U21 clash between Italy and Denmark on Sunday in protest to his decision to turn down the new contract offer.
Mihajlovic, who gave the rising star his start at Milan in 2015, believes the situation has been handled poorly and that it would be in the player's best interest to stay at Milan.
"Gigio is very strong, but he's still a boy," he told Sky Italia.
"To become a champion, he has to grow in an environment that loves him and can help him.
"There's no need to rush, although I understand [agent Mino] Raiola doing it for his clients.
"I would stay some more in gratitude to Milan, to grow and I think because they offered him a big contract.
"He now has half of Italy against him and that can be tough. The situation could have been handled better by both sides."