Paul Pogba could be out of action for a "few weeks" after suffering a suspected hamstring injury that took the shine off Manchester United's successful return to the Champions League, manager Jose Mourinho said.

United, who missed out on qualification for Europe's premier club competition last season, coasted to a 3-0 victory on Tuesday, with goals for Marouane Fellaini, Romelu Lukaku and Marcus Rashford.

But, making his debut as United captain, Pogba lasted just 18 minutes of the Champions League Group A game before being forced off by an apparent left hamstring injury, with Fellaini taking his place.

The 24-year-old Frenchman reportedly left Old Trafford on crutches