Wednesday 22 April at 09:59 : Apr.22 (GMM) France's only formula one driver Sebastien Bourdais is "too negative", according to quadruple world champion Alain Prost

Despite achieving immense success in American Champ Car racing, 30-year-old Bourdais has comparatively struggled as he begins his second season with Toro Rosso

Last year, his teammate Sebastian Vettel was the Italian team's standout performer, while in 2009 F1's only rookie Sebastien Buemi is already turning more heads than the bespectacled Frenchman

Bourdais strongly bemoaned the last two wet races, including last weekend in China, when he said the race should not even have started

Moreover, after saying last year's STR3 didn't suit his driving style, he has told the press this week that the new Toro Rosso is even less to his liking due to the harder Bridgestone tyres

But countryman Prost is not impressed with Bourdais' rhetoric, believing the complaint about the Shanghai rain was just "one more excuse"

"Toro Rosso actually went very well in the rain," the winner of 51 races told French radio Europe 1

"I think it is more the fact that he could not make do, especially in relation to Buemi," Prost, 54, surmised

"One gets the impression with him that he begins to look at things in a negative way very quickly," he said of Bourdais

"It's not my place to attack him," Prost acknowledged, "I am just trying to explain it. I appreciate his reservations about the rain. It is more to do with his negativity."n