According to the Italian "Transfer Market", Chelsea are paying attention to Milan goalkeeper Donnarumma.
Milan is trying to renew his contract with Donnarumma. His contract will expire next summer. It seems that the possibility of renewal is relatively high, but once there is a problem with the renewal, Chelsea will make further attempts.
Prior to this, Juventus, Manchester United, Paris and many other teams have intentionally introduced Donnarumma, but Milan is likely to break the salary convention to renew his contract.