It is understood Fellaini has a good relationship with Mourinho, which could be a key factor in the player's eventual decision.
If the likes of the out-of-favour Luke Shaw depart in the New Year, the United manager may well attempt to seek the signature of Valencia's Carlos Soler, according to The Independent's Miguel Delaney.
However, The Independent claim that United plan to offer Andreas Pereira (who is now on loan with Valencia) in part exchange for the Spanish Under-21 global.
There will not have been a huge increase in his wages given that the player turns 30 next week.
United's advert adds'a flexible attitude and approach is essential to meet the needs of players
Fellaini may also be looking for more game time because while he is a valuable squad member he is still not first choice when everyone is fit. The Belgian-born Brazilian is on loan at the Mestalla this season and has made nine appearances thus far.
Foreign clubs can agree pre-contract terms with Fellaini from January, with Besiktas 4/7 favourites with Sky Bet to land the midfielder before the end of the January window.
He was seen as the on-pitch symbol of David Moyes' doomed ten months in charge.
The France star returned to Carrington last month to step up his rehabilitation, after spending weeks in Miami recuperating, and spent time last week training with the club's reserves, encountering having no issues.
Apple Watch can detect sleep apnea and hypertension, study shows
Both conditions are common but often go undiagnosed, yet can lead to life-threatening problems like a stroke or heart attack. Part of the goal of the work is to determine whether technology like the Apple Watch can even be useful for health at all.
Russian Federation moves to target foreign media in RT registration row
USA intelligence agencies have alleged that RT served as a tool for the Kremlin to meddle in the 2016 US presidential election. It now needs the approval of the upper house and President Vladimir Putin before becoming law.
Belated Trump's responce to Texas Church Shooting has enraged Twitter!
Twitter users were quick to slam Trump after the Tweet, which still remained on his twitter feed a day after it was posted. Some Twitter users suggested that Trump may have just been confused by all the mass shootings in America lately.