Alonso insists title is the only target

The two-time world champion had a very strong end to the 2008 season and, despite the radical rule changes introduced for this year, the Spaniard admits he is starting the campaign with optimism and aiming for the top.

Alonso concedes, however, that achieving their targets will not be easy at all.

"In 2009 we have to aim very high," Alonso told Eurosport in an interview. "Our goal is to win the championship. Obviously we know it will be difficult.

"We know our rivals are very strong but we need to aim for the top more than ever."

He added: "When you win a drivers' title, winning the constructors' one is more special because usually it's harder to score points. So winning both titles is our goal. That was very hard to do last year, but then, when we were strong in the final races our goals changed.

"Now, before the start of the season, we need to be optimistic. Winning both titles is our target."

The Renault driver said that it is hard to predict who is favourite for the title due to the introduction of new rules.

"The drivers' championship will be very open this year because with the new rules anything can happen and any team can be fast," he said.

"But it will be the strongest teams like Ferrari, McLaren and BMW who will fight for the title."

Alonso also admitted he is confident Renault's KERS will be strong, and he believes the team will already use it in the first race of the season.

"Our system is really good, it's working well, without problems. I think we will start the championship with it, but it's not a big worry.

"It's true that it could cause problems this year, but we have to avoid trouble with this system. We need to test it more before the season begins."