Manchester United fear Paul Pogba won't make next month's clash with Liverpool.

The Sun says the midfielder is out for at least four weeks with a hamstring injury and is a serious doubt for the clash against Liverpool.

Jose Mourinho hopes the £89million midfielder will be fit for the trip to Anfield on October 14.

Pogba hobbled off the pitch in last night's 3-0 Champions League win over Basel and was seen leaving Old Trafford on crutches.

A scan carried out at United's Aon Training Complex today confirmed Pogba faces a month on the sidelines.

Mourinho is understood to be willing to bide his time with the France star's recovery.

He is taking a similar approach to the return to health of Zlatan Ibrahimovic.