Per the source, the Belgium global turned down a new contract deal and is free to negotiate with clubs about a summer move.
The new two year deal - a year plus a year's extension - was on similar basic terms that he is now on of £120,000 a week but with a greater incentive package.
Mourinho is reportedly keen on keeping him at Old Trafford, although the Belgium worldwide, who has missed United's last 11 games through injury, is looking for a new challenge - and it is thought that he has big money offers on the table from both China and Turkey.
The 30-year-old is likely to have a number of suitors both in the Premier League and overseas and with him being a free agent he will have all the advantage in terms of negotiating a lucrative deal. However, he has been appreciated in recent months, having put in some impressive performances. The Belgian recently returned to the first-team after missing the 12 games.
The Dutch utility man has made 15 appearances, but just three of those have been starts in the Premier League and ESPN claim Blind will consider his options at the end of the season.
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