Red Bull advisor Helmut Marko thinks it is likely the "special" Sebastian Vettel will be driving for the team next season.

The German is currently impressing for Scuderia Toro Rosso, Red Bull's B-team, and has been tipped for bigger things.

And Marko told admits it is likely the 20-year-old will be driving for Red Bull by the time the next season starts.

He told Autosport: "I think so, yes.

"He's a special one and he is very developed for his age. He can be very aggressive in the car but he's also technical and well trained.

"Red Bull has been with him for eight years and we have a contract for another couple of years."

Toro Rosso team principal Franz Tost also had nothing but praise for Vettel.

"He is one of the best young drivers so far," he told Autosport.

"He's been racing for 15 years so from the driving side he's very mature. But he's also really clever and I think this is a key to his success.

"Sebastian is on a much higher level than many other drivers ­both in and out of the cockpit.

"He knows he can do the job if we provide him with the right car. He has already reached a very high level and it depends which car he will get for next season but he can become a front runner."