A report claims Marouane Fellaini could be sidelined for six to eight weeks at Manchester United with a knee injury.
ESPN claim the midfielder potentially suffered medial ligament damage during his brief substitute outing against Tottenham at Wembley last night.
The Belgium star, whose contract is up in the summer, appeared as a substitute in the 2-0 defeat at Spurs, but lasted just seven minutes before himself being replaced by Ander Herrera.
Fellaini is set to undergo scans at Carrington on Thursday and if he has damaged his medial ligament he is likely to require surgery, which could sideline him for two months.
The problem is the same knee that has troubled him this season. He missed a month of action October after being injured on international duty.
He then suffered another injury to the same knee in late November – an injury which only saw him return to action at the start of last month.