We just don't test enough - Bridgestone - 10th May 18:00pm GMT

With a change in regulations this year it has certainly put Bridgestone and Ferrari back and when Montezemolo says something you know its major.

"With these new regulations it's more of a World Championship for tyres than for cars. I'm worried because I see, after five races, that we have a very competitive car, but we have a big problem with the tyres. Bridgestone have worked very well in previous years, but with these new regulations, tyres have an excessive and certainly decisive role," Di Montezemolo said. "I hope the situation improves because we have trouble in being fast both over a hot lap and over the race distance."

Bridgestone have yet to identify the cause of the deflations to front and rear left tyres that forced Schumacher out of the Spanish Grand Prix. Whatever the answer to that particular problem, it will not solve the wider difficulty, which according to Bridgestone's head of motorsport tyre development, Hirohide Hamashima, comes down to testing.

He said: "The explanation is simple: we don't test enough. They say Ferrari test more than anyone but last winter, when we had only one car at our disposal, there were teams lining up three of them. And besides, our rivals can count on several top teams, so they can improve much faster. This is particularly decisive this year, with these new regulations."