Manchester United striker Wayne Rooney says there's no danger of complacency going into their clash with Manchester City.

He missed last week's FA Cup quarter-final replay defeat to Chelsea and saw United's hopes of a first Double in 10 years disappear.

Now he is determined to ensure United don't concede their seemingly insurmountable advantage in the league over City - just like they did last term, when they lead by eight points.

"One bad game and everything could fall and so we go out and play each game with a positive attitude," Rooney told the Daily Mail.

"You have to stay focused. You have to make sure that we keep doing our job and keep are concentration."