Per the source, United would accept a £10 million offer for the Belgium international and Jose Mourinho has told him that he will not feature in his plans this season.
Januzaj has had no shortage of suitors with Italian giants Lazio becoming the latest side to get linked with the 21-year-old.
The Lions would however, be inclined to making a loan move due to his asking price. The Istanbul giants are banned from European competition for one season due to failing to meet FFP regulations and have been forced into tightening the pursestrings this summer.
Fenerbahce lost Luis Nani to Valencia over the summer while Besiktas star Gokhan Tore joined West Ham on a one-year loan and both sides are looking for a replacement.