Gianluigi Donnarumma's heir was already identified by AC Milan: Mike Maignan from Lille, who just won the French Ligue 1 beating the competition from PSG. Therefore, the Italian goalkeeper is set to leave the club as a free agent.
It is no secret that clubs would be interested in signing the player. However, even when he would be on the move as a free player, coming to an agreement remains hard.
As explained by Tuttosport, Juventus, Barcelona, and PSG are all in the race for the keeper's signature. However, they must first make room on a financial level which is by selling their starting goalkeepers.