Tost agreed with Prost that Bourdais too negative

Team boss Franz Tost agrees with Alain Prost's recent criticism of Toro Rosso racer Sebastien Bourdais.

Last week, quadruple world champion Prost said France's only Formula One driver "begins to look at things in a negative way very quickly."

To Germany's Auto Motor und Sport, Tost agreed: "He knows how to drive a racing car fast, however his negative attitude gets in the way too often."

Bourdais has scored just one of Toro Rosso's four points so far this season, but even the impressive rookie Sebastian Buemi did not escape Tost's reprisals.

Buemi and Bourdais qualified 17th and dead last respectively in Bahrain, and although hard braking circuits apparently do not suit the STR4, team figures suggested driving errors worsened the situation last weekend.

Tost said: "With such a close field, you cannot afford errors. Our drivers must understand that."