Belgian was said to have been in city's Swissotel as he recovers from a hamstring injury he picked up in international duty
TURKISH fans have gone into meltdown after a video was posted online appearing to show Marouane Fellaini in an Istanbul hotel.
The Manchester United midfielder has been linked with a move to Besiktas, Fenerbahce and Galatasaray since the summer.
And while United have insisted that Fellaini is not for sale, the frizzy-haired hardman continues to be named as a target for all three Istanbul giants.
His contract is up at the end of the season and Mourinho admits he is "worried" that the big man could walk away for the club.
Fellaini's apparent sighting in the city's Swissotel has fuelled speculation that he could be on his way to the Turkish Lig.
But the lanky figure is actually the giant's doppelganger twin brother Mansour.
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After bagging Nemanja Matic at the end of July, Mourinho insisted Fellaini will not be sold.
Mour warned: "It is easier for Galatasaray to get me than Marouane. Forget it. He's very important for me."
Fellaini has been out of action since injuring his knee in Belgium's 4-3 win over Bosnia on October 9 but is expected to be back soon after the next international break.
United host Newcastle on November 18 with a trip to Basel in the Champions League coming four days later.
