TOKYO (REUTERS) - Four-time Formula One world champion Sebastian Vettel is leaving Red Bull at the end of the season and his seat will be taken by Toro Rosso's Daniil Kvyat, the team announced on Saturday.
"Sebastian Vettel has advised us that he will be leaving Red Bull at the end of the 2014 season," Red Bull said in a statement.
"We want to warmly thank Sebastian for the incredible role he has played at Red Bull for the last six years."
Vettel has struggled to recapture championship form this year following the implementation of new technical regulations for the sport, and has yet to win a race.
He is in fifth place in the championship standings, with team-mate Daniel Ricciardo in third behind the Mercedes pair of Lewis Hamilton and Nico Rosberg.