Reports have claimed the Turkish side are ready to bid for the 31-year-old, who has entered the final year of his contract, but United also have an option to extend by a further year.
However, United will not entertain any offers for their talisman, who was named Premier League Player of the Year last season after breaking the competition's assist record.
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The £57m release clause for foreign clubs in his contract has now expired.
In December, Fernandes revealed he had been "hurt" when United told him last summer he was free to accept a big-money offer to join Saudi Arabian club Al Hilal, who were ready to pay £100m as a transfer fee.
Despite Fernandes feeling as though the club were open to selling him last summer, the message from the hierarchy since has been clear: he is not for sale.
The ambiguity of last summer has been put to bed with United viewing Fernandes as crucial to the future of their project.
More to follow.
