Bailly has been cast out of the first-team squad and has been training away from the rest of the team as the club look to move him on in the coming weeks.
The defender has been told to find a new club and Besiktas are interested in taking him to Turkey in the ongoing transfer window.
Talks are under way between the parties as Besiktas have offered to sign him on a free transfer this summer.
But it has been claimed that there is Saudi interest in Bailly and they are willing to offer a fee to Manchester United.
The Premier League giants are keen to move him on as soon as possible and are willing to listen to all kinds of offers.
However, they are likely to favour clubs who would be prepared to offer a small fee for the centre-back.
Besiktas are hopeful that Manchester United will agree to mutually terminate the centre-back’s contract with talks taking place today.