Manchester United great Wayne Rooney says England must not be complacent facing the USA in tonight's World Cup clash.

DC United coach Rooney believes the USA have a chance to shock England after seeing how both teams played in the World Cup's opening games.

"In the first half against Wales, USA were excellent. They moved the ball quickly, they were aggressive and had a lot of energy in their game," Rooney said in The Times of the USA's game against Wales.

"I think here the Americans' approach will be similar.

"They will be on the front foot and have a go at taking the game to England and it will be a completely different challenge from the one England faced against Iran. A tough game.

"England need to be at it, right from the start of the match, or they may get a shock."