Fellaini joined the Red Devils from Everton last year, but with the man who took him to Old Trafford, former Toffees' boss David Moyes, now out of the job, his future looks uncertain.
The Belgian international failed to find the back of the net at all last term and also struggled with a wrist injury, which prompted some Manchester United fans to turn on him.
According to the Times, Manchester United are willing to let Fellaini leave with the hope of recuperating around £15 million - that's a huge loss on the £27.5 million they paid for him less than 12 months ago.
The paper adds that new Red Devils boss Louis van Gaal is looking to take the team in a different direction, and won't look to rely on Fellaini's physicality and strength.
The Dutchman will instead look to sell him and re-invest the money back into his new squad, with a major summer of spending ahead of him. Although Van Gaal is now focusing on leading the Netherlands at the World Cup, Manchester United vice president Ed Woodward is working in the background to recruit new players.
The Times say that with the likes of Rio Ferdinand and Nemanja Vidic already out the door Van Gaal would like up to five new players, with the likes of Mats Hummels, Arjen Robben and Luke Shaw all linked with a switch to Old Trafford.
The could also spell the end for six more players who may leave the club before the end of the summer window.