Robert Kubica has refused to commit to himself to Renault beyond the end of the 2010 campaign despite his strong start to the season.

Kubica currently sits sixth in the championship standings and has already scored two podium finishes - with second in Australia and third in Monaco. Had it not been for his coming together with Adrian Sutil in Bahrain, the Pole would arguably have scored in every race so far.

Renault's strong start to the year is in stark contract to last year when the team struggled both on and off track thanks to the scandal that surrounded the incident in Singapore in 2008.

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With Kubica having regained the kind of form that saw him win for BMW Sauber and launch a title challenge two years ago, a move elsewhere has been mooted for 2011 although he insisted it was too early to comment on his future.

"It's not the time to talk about it," he told the Press Association. "There will be time for me to talk about whether I will be staying with Renault or not.

"For me, for now, it is still too early. It's all about feeling, and once I get a feeling as to what I must decide then I will do it. Too many people, when I signed for Renault, told me I was wrong, that it was a bad move.

"But I'm pretty happy with my decision, and I hope I can rely on my decision-making for the future."

Kubica added that he is pleased with the way his season has panned out to date and insisted the team was working well in its bid to take the fight to its rivals.

"We can be happy with the start to the season and the job we are doing," he said. "The guys in the factory are also doing a good job because for every race they are delivering new bits on the car.

"It's not easy to catch up with the other teams because they are working hard too, but it's good to see the people pushing with the way they are working on the car."