Wayne Rooney has vowed to do himself "justice" during the 2010 FIFA World Cup South Africa™ after admitting he was well below his best in Germany four years ago.

Rooney was playing catch-up during the last tournament after suffering a broken foot in the April before in a tackle by Chelsea's Paolo Ferreira at Stamford Bridge and, by his own admission, he was lacking the sharpness required for a FIFA World Cup.

However, Rooney feels in a more upbeat mood now, despite England only managing to draw their opening game with the USA, and the Manchester United star admits it will be "more or less down to me" to score the goals if England are to achieve glory next month.

"I feel a lot more comfortable and more positive this time than in Germany," said Rooney. "With the last World Cup, I didn't train with the lads beforehand, and didn't play in any of the warm-up games because of my injury. I got thrown straight into a few games and you know you are not match fit.

I'm hoping this World Cup I can do myself justice. I am happy. I feel good.

Wayne Rooney, England striker

"I didn't feel that I did myself justice and I'm hoping this World Cup I can do myself justice. I am happy. I feel good and the way the lads have trained, we are looking good and sharp."

Rooney has hit the target 25 times in 61 appearances for England, although he has managed only one international goal in the last 12 months - against Croatia at Wembley. He is confident, however, that the sequence will end sooner rather than later.

"The fact I've not scored for England for a while is not really a concern," he said. "I'd like to score. As a forward you want to score goals. I don't mind not scoring if we win. But I know for us to win, it will be more or less down to me to score the goals - whether it is now or later in the competition. I hope I go on a real scoring run when I get my next goal. It is nice for a forward to score goals and hopefully I can get one on Friday."

Rooney insists he is happy to play within whatever system Fabio Capello opts to start with against Algeria, feeling equally at home in a lone striking role or alongside either Emile Heskey, Peter Crouch or Jermain Defoe.

He said: "It is down to the manager to decide. I will play wherever he wants me to play. Throughout the qualifying campaign, it worked really well with myself and Emile so if that is how he wants to play, I am happy with that. I enjoy playing there so I have no problems with that. But I feel comfortable whether with a partner or on my own. I am happy either way."