Barrichello has lived in his team-mates's shadow for some time

The Brazilian has been overshadowed by team-mate Michael Schumacher in recent years and was second behind him at the season-opening Australian Grand Prix.

But Barrichello said ahead of the Malaysian GP: "I'm a believer who believes a dream can become reality.

"My chances of winning the world championship are the highest they have been in my whole career."

Driver profile: Rubens Barrichello

Barrichello has rarely gained the upper hand over Schumacher at Ferrari.

But the Brazilian said: "I know it's a difficult task because of having a very quick and reliable team mate but I think I am capable as well.

If he can put on another step or not is something to find out. I hope not because then I am in trouble Michael Schumacher on team-mate Rubens Barrichello

"It's been Michael's championship for all of the last four years but I'm here to change that."

Ferrari's dominance in Melbourne led many to predict a repeat of 2002, when the Italian manufacturer won all but two of the races.

Team profile: Ferrari

"I don't see a 2002 championship," he said. "There is more competition around. I hope we do win here but I don't think if we win here that is it."

Barrichello has pledged his long-term future to Ferrari having signed a contract to race for them for another three years.

And Schumacher admitted his team-mate was getting tougher to compete against.

The six-time world champion said: "I think he is doing a fantastic job. If you look over the years, he has improved consistently.

"If he can put on another step or not is something to find out. I hope not because then I am in trouble."