There were initial fears that he had suffered a serious knee injury, with Belgium manager Roberto Martinez unsure of the extent of the damage.
He said: 'We are all anxious about Fellaini. With Romelu Lukaku also struggling with an ankle problem, it may be a makeshift United team that takes the pitch at Anfield in a week's time. The club's manager José Mourinho had already expressed concern that an global break could break the team's momentum before the crucial match, and will be quite unhappy with his worst fears coming true.
The Special One has never made any secret of his respect for the burly Belgian midfielder, and he even blocked an attempt by Turkish side Galatasaray to lure Fellaini away from United in the summer. "It is something to be anxious about on first sight".
Fellaini is now officially ruled out of Belgium's clash against Cyprus on Tuesday with a medial collateral ligament strain to his left knee. Four goals from 8 games in all competitions have equaled the number of goals scored by Fellaini last season from 47 parties. The Red Devils will clash with Liverpool in their next match on Saturday.