Aug.16 (GMM) The time for Sebastien Buemi's evaluation as a future Red Bull driver will be up at the end of the season.

Toro Rosso team boss Franz Tost told F1's official website that drivers should get a "maximum (of) three years" to show they have the potential to follow Sebastian Vettel in readiness for a top seat.

"Or let's put it this way: if you are not sure after three years whether he's going to make it, I would bluntly say forget him, period," said Tost.

Swiss Buemi, 22, made his F1 debut at the start of 2009 and is now considered the most likely Toro Rosso driver to make way for Red Bull's latest protege Daniel Ricciardo.

"I expect him (Ricciardo) to best (HRT teammate) Liuzzi after not more than three or four races," said Tost.

He admitted that both Buemi and his current teammate Jaime Alguersuari are "still deep in" the self-discovery phase.

"They are moving forward ... so let's wait and see how the second half of the season works out. Then at the end of the year we will sit together with Red Bull to discuss who will sit in our cars in 2012."

Tost said he is looking forward to working with Red Bull's next youngsters including Ricciardo and Frenchman Jean-Eric Vergne.

"Red Bull bought this team with the intention to give youngsters a chance to prove themselves and eventually rise to a seat with Red Bull Racing," he said.

Latest F1 News - Mobile version

26 Feb: New Ferrari not quickest in field - Domenicali 26 Feb: Red Bull still best in 2013 - Tost 26 Feb: 2014 French grand prix 'possible' - Prost 26 Feb: Danica Patrick 'not interested' in F1 switch 26 Feb: Report - Gilles Simon working on F1 engine for Honda 26 Feb: Gutierrez plays down link to Carlos Slim 26 Feb: Caterham exhaust 'legal' insists van der Garde 26 Feb: McLaren replaces Mercedes-bound Lowe 25 Feb: 'Engine maps' trouble for Red Bull, Lotus - report 25 Feb: Mercedes-bound Lowe to miss 2013 opener - report 25 Feb: Mercedes 'in group of teams' behind Red Bull - Lauda 25 Feb: Gutierrez expects Hulkenberg to beat him early in 2013 25 Feb: New Ferrari 'much better' than 2012 - Massa 25 Feb: Teams 'will adapt' to new tyre situation - Gutierrez 25 Feb: Tight rules make today's F1 cars 'the same' - Forghieri 25 Feb: Williams removes controversial exhaust trick 25 Feb: Contract 'conflicts' cause of Marussia test snub - Razia 25 Feb: Lotus to fight Red Bull for title - Gutierrez 25 Feb: Marussia 'ahead of Caterham' - Chilton 25 Feb: Sutil will not stay in F1 as test driver The latest F1 News - Mobile Version