Michael Owen believes that Paul Pogba would be among the best players in the world under a different manager.
Pogba has endured a stop start season at United, after winning the World Cup in the summer with France.
Much like his teammates, he has struggled for consistency and found himself on the end of a lot of criticism.
He was a peripheral figure as United lost 2-1 in Spain to Valencia in the Champions League on Wednesday night.
But Owen is a fan, saying on BT Sport: "I think the manager has to take some of the blame – the system, the way he plays.
"I remember when he first signed they were trying all kinds of midfielders in and around him trying to get the best out of him.
"I feel sorry for him from that point of view but, as a player, it is frustrating when you watch him because he still looks like a 16 or 17-year-old learning the game.
"I think he could do a lot worse than just going to watch a load of videos of Paul Scholes – see when to play one touch, see when to take loads of touches, when to beat players…
"I think he makes so many bad decisions in games, which is frustrating because if he was playing as he should… if he was playing under a Guardiola or a Klopp or someone like that I think we'd be looking at certainly one of the best few players in the world, but at the moment we can't say that."