Vergne and Ricciardo in running for 2012 - Tost

Toro Rosso boss Franz Tost has admitted four drivers are in the running to fill the team’s two race seats in 2012.

It was already known that the second Red Bull team’s current drivers, Sebastien Buemi and Jaime Alguersuari, could lose their seats at the end of the season.

Frenchman Jean-Eric Vergne kicked off his new Friday driving duties in Korea last weekend, and another Red Bull-backed hopeful is the Australian rookie Daniel Ricciardo, who currently drives for HRT.

"Jean-Eric is one of four drivers - with Buemi, Alguersuari and Ricciardo - that Red Bull is thinking about placing with Toro Rosso next year," team principal Tost told the French daily L’Equipe.

"We will take our decision in December. It’s really open and Jean-Eric is a possibility for 2012," the Austrian added.

Vergne, runner-up in this year’s Renault World Series, said in Korea that he expects to have a job at Toro Rosso next season.

"I like his driving style," confirmed Tost. "He has already demonstrated in the World Series his mastery of the car and his aggressiveness."

Tost revealed that another Frenchman is also in talks with Toro Rosso.

"We are negotiating with Charles Pic," said Tost, referring to the 21-year-old GP2 driver.

"There is a possibility that Charles will run a test with us during the days reserved for young drivers in Abu Dhabi."