Massa: Bridgestone Need to Make Progress

The Brazilian is the only driver who has tested both types of tyres this year, thanks to his run in a Ferrari during Monza testing last week, and he admits he was not won over by the performance of the Maranello team's Bridgestone tyres.

"It can't be denied that Bridgestone nowadays are having some difficulties," he told Autosprint. "More work needs to be done; you can also see Jordan and Minardi, who often don't go as fast as they should in relation to their potential.

"The Michelin [tyre] behaves differently in slow and medium-slow turns and under braking, where it gives more stability. But on fast [sections], the Ferrari with Japanese tyres went very well."

Ferrari have been reluctant to openly blame Bridgestone for their troubles this year, although Michael Schumacher did admit during Monza testing last week that it would be stupid of the team to claim any longer that their problems lay anywhere other than tyres.