Team boss Eric Boullier has insisted that the long-term future of the Renault team isn't in doubt despite media reports suggesting otherwise.

Speculation had suggested that the team isn't as financially stable as it may appear with reports emerging last season that the team had asked Bernie Ecclestone if it could receive payment that was due at the end of the year ahead of schedule - with the team insisting at the time that it was simply a cash-flow issue that was delaying development work.

The rumours have since refused to go away despite Renault's tie-up with Group Lotus but Boullier insisted there was no reason for concern and that the future of the team was secure - with the motivation of those who started the speculation about the team being questioned by the team principal.

"The future is very clear and bright," Boullier told BBC Radio Oxford. "We have solid sponsors, we have solid owners with a good financial background, we have some good plans.

"I understand there is some jealousy around in the paddock and some people who want to tease us. Affecting the morale of the people obviously was their target which was a bit naughty."

Renault has had to deal with the loss of lead driver Robert Kubica already this season after his rallying accident before the campaign started, but Boullier said he was pleased with the progress made so far this season by Nick Heidfeld and Vitaly Petrov.

"I have enjoyed a great start with two podiums in a row," he said. "It is obviously very challenging but it is good to see our boys here deliver a good car and a competitive car.

"The racing is also very good this year. The spectacle is good, the show is good for the fans and I think Formula 1 has a perfect cocktail."