The veteran, a former Monza player, is off contract in June.
"Patrice has to decide what to do with his future," Federico Pastorello said. "He is very close to United, but lately things have changed a little.
"Could he come back to Italy? Patrice has always highly regarded Serie A and so, if he were to leave England, it could be a possibility.
"But at the moment it is still too early to talk about next season."