Manchester United defender Rio Ferdinand admits he's been silenced by goalkeeper Edwin van der Sar after his spell between the posts for their FA Cup defeat to Portsmouth.

He told manutd.com: "I find it a bit embarrassing, to be honest! I'm quite critical when it comes to goalkeepers. I'm always thinking: 'Oh he should have saved that!' or 'How did he let that one in?'. I think Edwin rolls his eyes at me sometimes, thinking 'What do you know about goalkeeping?'. And he's right, of course! I found out myself what it was like against Portsmouth.

"I'm still annoyed that I went with the wrong hand for the penalty. I think I might have got there had I stretched with my left hand but my instinct was to go with my right. I don't think they'll be using that dive as an example on goalkeeper coaching DVDs!

"I wouldn't be a goalkeeper. No chance. It's the loneliest position on the pitch when your team's attacking the other end. It's really, really lonely. You're there by yourself with all that grass around you and no other players. There's just a crowd behind you and an empty net. It was a little eerie actually."