MANCHESTER -- Paul Pogba left Old Trafford on crutches following Manchester United's 3-0 Champions League win over Basel on Tuesday after being forced off with a hamstring injury.
The Frenchman, named captain for the night by Jose Mourinho, had to be replaced in the 19th minute by Marouane Fellaini after stretching into a challenge with Mohamed Elyounoussi.
Fellaini was only passed fit for the game on Monday after missing the 2-2 draw with Stoke on Saturday with a calf injury, but he still supplied the opening goal.
Pogba headed straight down the tunnel after leaving the pitch and will now be a doubt for Everton's visit to Old Trafford in the Premier League on Sunday.
United boss Jose Mourinho was unable to give a definitive update on Pogba's injury, admitting he does not yet know the full extent of the injury before a scan on Wednesday.
"I don't know [what the severity is],'' Mourinho said. "I just know from experience it's a muscular injury.
"In my experience, muscular injury stops you from playing for a few weeks, I think.
"It looks for me too [like a hamstring injury] but I haven't spoken yet to the medical department.
"Squads are for this, squads are for injuries, squads are for suspensions. We don't cry with injuries.
"So if no Paul for Sunday, we have [Ander] Herrera, we have [Michael] Carrick, we have Fellaini and we have [Nemanja] Matic.''
Pogba was playing in his first Champions League since joining United from Juventus for £89.3 million in 2016.
His last appearance was for the Serie A against Bayern Munich in the last 16 in March 2016.