Paul Parker wonders what sort of impact Paul Pogba will have at Manchester United.

The French midfielder was signed by the Red Devils from Juventus for a world-record fee of £89million earlier this summer and his return to Old Trafford has been met with an enormous amount of excitement.

However, former United defender Parker questions whether Pogba possesses the qualities to emulate past star midfielders Roy Keane and Bryan Robson as he may not even be up to the level of Chelsea's John Obi Mikel.

"Can he be as good as Roy Keane or Bryan Robson? I wonder about him playing that midfield role," Parker told 888Sport.

"I worry about him making tackles and getting across to close players down because he is rangy. He doesn't have quick feet and his game is about going to ground.

"That's going to be a problem. In a holding position it would be a waste because he's not a (Claude) Makelele or even a John Obi Mikel because one thing Mikel can do is close people down.

"Pogba can get forward, and score goals, and pass the ball but in a high-tempo game he won't be very good in a deep role. We saw that in the Euros where he looked lost for long periods of games when France didn't have the ball.

"So when United don't have the ball what's he going to be like? (Marouane) Fellaini can't do that either. Or (Wayne) Rooney. They can't get around. Behind Ibrahimovic and Martial there will be changes because there is no way that midfield can last."