Cristiano Ronaldo pledges to win back the hearts of Manchester United fans

The Portuguese winger was involved in a long-running transfer saga over the summer and was quoted as saying he wanted to move to Real Madrid.

The 24-year-old eventually stayed at Old Trafford, and he has drawn parallels with the reaction he faced after the World Cup two years ago, where he was vilified for his part in Wayne Rooney's red card in England's quarter-final defeat.

"A part of the supporters show themselves to be more unhappy than others. But I hope to change their minds," he said.

"When I put on the United shirt I give my maximum. Nobody can condemn me on this.

"I hope it will be similar to when I came back to England after the 2006 World Cup and I can win the fans back."

United were critical of Madrid's approach and refused to sell their star asset, but Ronaldo insists it was his decision to stay.

"Nobody can convince me about anything," he said. "Since I was young I've had to make decisions, I make them alone.

"I want to win more at this club. If the boss thinks I have to stay on the bench I respect that, even if it's difficult."

Meanwhile, Carlos Tevez has said he is happy at United, despite struggling to keep a regular place in the starting line up.

The Argentinian striker was a key player in United's Champions League and Premier League double last season, after moving from West Ham, but Wayne Rooney and Dimitar Berbatov have been preferred to Tevez in recent weeks.

With Cristiano Ronaldo now fully fit as well, manager Sir Alex Ferguson has admitted he faces a difficult balancing act up front.

Tevez's two-year loan deal expires next summer and he is yet to sign a permanent contract, but he insists he is not thinking of leaving.

He told the Daily Mail: "This season is proving more complicated than any other and it is difficult for me to get in the team. The competition with Cristiano Ronaldo, Wayne Rooney and Dimitar Berbatov is intense.

"This club have the most talented forward line in England and the manager has decided that we cannot all play in the team at the same time. I want to play more and the coach knows this.

"But I have no problem with him. We have spoken. There is no way I would want to leave this club. I insist I am calm.

"I have confidence in the coach and he has in me. In this sport it is necessary to be patient and I will be."