Until now, Manchester United are still struggling to figure the cause of knee pain that keeps star player Maroune Fellaini on the sidelines.
The United midfielder picked up knee ligaments injury while playing for national club Belgium against Bosnia last October 7.
Fellaini was able to return in November to feature in four consecutive matches and played 90 minutes in the 1-0 defeat to Basel in the Champions League on November 22.
But since coming on as a late substitute against Brighton at the Old Trafford on Nov. 25, the 30-year-old has failed to play on the pitch.
Fellaini has undergone a series of tests in hopes to find out his injury’s root cause but the result remains a mystery.
This has left Mourinho and Unite’d medical staff unable to put a timetable on his return to the Old Trafford.
Meanwhile, the club is also hopeful to have Fellaini sign on a new contract as his current deal is set to expire at the end of the 2017/2018 football season.
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