Sebastian Vettel says winning a third consecutive title has not quenched his desire and he is as determined as ever to win a fourth championship in 2013.

The Red Bull driver says he has never struggled for motivation and is already starting to think about next season.

“I want us to be as successful in 2013 as we have been this year and the previous two years,” Vettel said.

“Personally, I have never had to simulate motivation – that is part of my nature.”

Vettel won the drivers’ title in a nailbiting climax in Brazil at the end of November, beating Ferrari’s Fernando Alonso by just three points after a 20-race season.

“Right now it is nice to savour the title win and everything that goes with it,” the 25-year-old told the official Formula 1 website.