Birmingham City boss Alex McLeish admits he's impressed by next opponents Manchester United.
McLeish was at Old Trafford on Boxing Day to watch Sir Alex Ferguson's side maintain their unbeaten Premier League record this season with a win over Sunderland.
"They were pretty impressive," he said.
"Someday, Man United will lose a game, and I'm hoping and believing it's us that can do that.
"We're at St Andrew's, and I think we have to believe.
"We've upset the big teams before, and it would be nice if we can do that again.
"We've heard opposition managers of those teams say it's a difficult place to come to and we want United to be saying that after the game."
