The Holland international, 27, arrived at Old Trafford from Dutch giants Ajax for just under £14m three years ago.
And since then he's racked up 131 first-team appearances for the Red Devils, four of which have come in the Premier League this season.
Blind is not an automatic starter at United though, with strong competition for places and an uncertainty over which position suits him best.
The latest reports suggest he could be offered the chance to leave England for Turkey when the transfer window reopens in January.
According to Tutto Mercato Web, Blind may quit United in the new year.
They claim Fenerbahce have made an offer to get him on-board.
Galatasaray are also credited with interest in Blind by the transfer rumour specialists.
Blind is only under contract at United until the end of June 2018.
Although the club have the option to extend his stay for a further 12 months.
Whether Jose Mourinho wants to keep hold of Blind remains to be seen.
