Milan could turn their attention towards Eric Bailly after failing to sign Dejan Lovren from Liverpool, report Tuttosport.
The Rossoneri had made Lovren one of their leading transfer targets as they seek to bolster their defence ahead of next season.
However, they have been put off by Liverpool's £18m valuation and are now searching for alternatives.
Bailly is one name that has been mentioned at San Siro, with the Ivory Coast international now into the final 12 months of his contract at Old Trafford.
The former Villarreal centre-back missed most of last season through injury and it is unclear whether or not he is in Ole Gunner Solskjaer's plans.
Milan have also included Newcastle's Fabian Schar and Schalke's Matija Nastasic on their shortlist.
READ MORE
Why Manchester United have shot themselves in the foot this summer
5 centre-backs not called 'Harry Maguire' who Manchester United could sign instead
‘After Manchester City’s recent form, maybe they’re the underdogs against Manchester United!’ Former Red Devils defender on this weekend’s derby
‘Arteta, Alonso, Emery, me… none of us were physical players – we needed the understanding of the game. That probably helped us move into management’: Premier League boss reveals reasons for natural career progression
