Buemi realistic on chances at Toro Rosso

Buemi is believed to be Red Bull motorsport advisor Helmut Marko's preferred candidate as replacement for Sebastian Vettel next year - but still needs to prove his capabilities to team bosses Gerhard Berger and Franz Tost.

And although Tost told Swiss newspaper Le Matin today that Buemi would be a good signing for them if they could partner him with an experienced driver, Buemi is still not getting carried away with his chances of being given a race chance.

"I am a bit excited, but I try to stay calm," Buemi said about the talk regarding his future. "I did my best, but maybe I will test again before they take a decision. So I have to wait and see."

He added: "My objective is for sure to be in F1 next season. I was feeling a bit of pressure about that, which was normal, but now it is over. I did my job."

When asked if he felt he had done a good job, Buemi said: "I think maybe with the new tyres it could have been a bit better, because I could not manage the last bit of the tyres.

"I think maybe the final tenths could have been a bit better, but my feedback and long runs with old tyres were good, I think. I don't know when we will get a decision, but we will know for sure."

Toro Rosso also tested Takuma Sato this week and are still weighing up whether or not to retain Sebastien Bourdais for a second season.

Tost told Le Matin: "After what we noted this week, and in so far as we manage to find an experienced driver to race alongside him, I think we can take the risk of having Sebastien at Toro Rosso in 2009. You can consider than as an official declaration."