The 32-year-old left-back is out of contract at the end of the season.
"Patrice has to decide what to do with his future," his agent Federico Pastorello told Tele Radio Stereo.
"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."
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