Rio Ferdinand admits Manchester United feel unbeatable at home.

The defender reckons the atmosphere and the noise created by the home fans intimidates visiting teams so much that he and his team-mates never feel that a game they may be losing is a lost cause.

He told the Daily Star Sunday: I think the biggest thing at Old Trafford is that teams can go one or two goals up against us and even if they walk in at half-time, two-up, they there's good chance we will come back and win the game.

That's the belief we've got, that's the belief the fans have got. Many teams come here knowing it's going to be a long battle.

"It is the best stadium in the world to play in. The atmosphere, the fans - it's electric."