Manchester United legend Sir Bobby Charlton admits some concern over their goalkeepers.

David De Gea was brought in for big money from Atletico Madrid but has put in a number of error-strewn performances, while Anders Lindegaard and Ben Amos have also failed to make the No1 jersey their own.

United legend Charlton is concerned over the lack of physicality from the trio but believes their talents will eventually shine through.

Charlton said: "Edwin van der Sar created a position that was always was going to be difficult to fill. The defenders in front of him trusted him.

"But he's not there any more and we've got some young players. A lot of them seem to have underachieved from the start but are going to be quite capable once they settle in.

"If I had one criticism it is that they are not imposing players because they are physically not tall or big which I think is necessary for a goalkeeper.

"I've been to most of the matches recently and they all seem to have made mistakes, some less than others. But some are doing really quite well now."