Galatasaray are confident of securing Fellaini, with the Turkish club’s president, Dursun Ozbek, or another board member due in Manchester on Monday or Tuesday to finalise a transfer.
An agreement has been reached in principle with Fellaini over a four-year contract worth in the region of €4m (£3.6m), which would make him their highest-paid player. The 29-year-old joined United from Everton for £27.5m in 2013.
Galatasaray, who recently parted ways with Wesley Sneijder, are also in talks with the Manchester City midfielder Fernando but Fellaini is their priority.