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MANCHESTER -- Paul Pogba was forced off with an apparent hamstring injury just 19 minutes into Manchester United's Champions League return against Basel.
The Frenchman, named captain for the night by Jose Mourinho, had to be replaced with 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.
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.
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.