Rio Ferdinand insists there's no concern at Manchester United over their form.

United face Liverpool on Sunday already four points behind table leaders Chelsea.

The defender said: "There is a frustration with results but not with performance," he said. "We have been in commanding positions, so not to come away with six points from those two games is disappointing.

"But overall, we are pleased with the way we are playing. We have been scoring goals freely, including five in two games away from home. The main point is that we have to finish them off."