Toro Rosso have confirmed Sebastien Buemi will stay with the team next season.

The 21-year-old was the top rookie last year, making some notable performances and taking six points in the championship.

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

The outfit are yet to name their second driver, although Spanish 19-year-old Jaime Alguersuari is expected to remain at the Ferrari-powered team after replacing Frenchman Sebastien Bourdais in 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."

New Zealander Brendon Hartley will also be tried out by Toro Rosso in December, when teams will only be allowed to test young drivers.