LONDON, ENGLAND (Reuters) - Switzerland's Sebastien Buemi will stay with Toro Rosso next season, the Formula One team said on Tuesday.

"I can confirm that we've signed Buemi for next year," a spokesman said.

The Ferrari-powered team have yet to name their second driver, although 19-year-old Spaniard Jaime Alguersuari is expected to remain after replacing France's Sebastien Bourdais last July.

"Dietrich Mateschitz bought this team to give young drivers a chance, and this is our philosophy," team principal Franz Tost told the autosport.com website.

"We have to stick to this philosophy, and I'm quite confident that from the middle of next year onwards we will have a good driver line-up, because then Alguersuari will know all the tracks, and Buemi is increasing his performance already."

Buemi, 21, was the top rookie last year with six points and some impressive performances.

Toro Rosso will also try out New Zealander Brendon Hartley in December, when teams are allowed to test only with young drivers.

Sister team Red Bull are due to give 20-year-old Australian Daniel Ricciardo, this year's British F3 champion, a test at Spain's Jerez circuit at the same time.