Manchester United midfielder Paul Pogba is set to miss a further two months with a hamstring injury that has kept him out of his side's last five games.
The Frenchman sustained the injury during last month's 3-0 Champions League victory over Basel.
The Sun have reported that United's medical staff expect Pogba to be absent until late December, meaning that he will miss crucial Premier League games against Chelsea and Tottenham.
The club are believed to be concerned that his running style may have been the cause of the injury, and are considering using a running coach in the hope of avoiding a recurrence.
"His injury is not one that I can have the hope like I can have with others," manager Jose Mourinho said prior to the latest update.
“With long-term injuries, I don’t speak about them, so Ibra, Pogba, Rojo and these players, I don’t think about them.
“We never miss the players that are injured. That is our way of thinking. They are injured, we don't think about them.
"It is an opportunity and a moment for others to step up and get the chance, so I think that is good.
"When we moan all the time about injuries it looks like we don't trust the other people and we have to.”
Pogba's midfield teammate Nemanja Matic, meanwhile, added: “We know that he will be out for some time. He’s very important for us, a great player, but I am sure he will be ready soon.
“Paul is very important for Manchester United but we also have great players to play instead of him.”