The veteran Swede's contract expires at the end of the season.
â€śWe'll see, the evaluation will be made with the player as well as the club. He is giving so much to this club, bringing mentality and quality," Massara.
"We'll enjoy him as long as we can and relish his 100th Milan appearance."
Massara also commented on new contract talks with Gigi Donnarumma.
He added: â€śWe'll talk to his agent and try to keep him here, as he is a key figure in the squad despite his tender age and we want him to remain a key figure in future.
â€śWe're confident Gigio wants to continue with us too, so there's a good chance he will extend his contract."