Manchester United boss Sir Alex Ferguson insists he has no concerns over their disciplinary record.

Ferguson denies his players are dirty - despite Manchester United having the worst disciplinary record in the Premier League this season.

United have been shown 15 yellow cards and one red, despite playing one fewer game than their rivals.

Seven of those yellows came in the 1-1 draw at Chelsea a fortnight ago, but boss Fergie claimed his men had been harshly treated by match officials.

"We've had two of our toughest away games in a row, at Liverpool and Chelsea," he said. "It's very difficult for a referee at Liverpool, as we all know.

And if you analyse the Chelsea game there wasn't a bad tackle in the match.

"So I've no problem with the discipline of my team, none at all. We always try to play our football, play the right way and that's the way we will continue."