Red Devil looking to improve on last weekend
Rooney has now watched a DVD of his display and wants to improve dramatically against Algeria on Friday, having now fully shaken off the ankle injury which affected him towards the end of last season.
"There were glimpses but I know I can play better," he told reporters.
"I don't worry about it. I watched the game that night. I saw where I should have been, improve positions. It was quite interesting to watch it again and see where I could do better.
"But anyone can have a quiet game.
"International football is quite difficult now. We need nine out of the 11 players to do well to win games.
"This is a great opportunity for me to prove myself at world level.
"I look at what Maradona and Pele did. They took the World Cup by the scruff of the neck and virtually won it single-handed.
"If I can manage half of what they achieved, it would be great.
"It was difficult for me to play as well as I wanted after I got the injury against Bayern Munich. I played when I probably shouldn't and lost my match fitness and sharpness.
"Even in Austria I had a few niggles and I held myself back in training.
"But since we've come over here I've felt sharp and been flat out.
"When I was playing well and scoring goals earlier in the season I was sharp and hungry in training. That is how I feel at the minute."
Rooney is also keen to break his goalscoring duck at the tournament, as his drought in front of goal for England lingers on.
"Of course I want to score," he said.
"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."