Theb Formula One champion and current championship leader Sebastian Vettel is set to join Ferrari in 2014, according to the BBC.

The German, who won the F1 title in 2010 and 2011, has already signed a contract with the Italian team with an option to join in 2014 depending on results, the BBC has reported, and will replace Felipe Massa to team up with another double world-champion, Fernando Alonso.

The BBC claims Alonso has sanctioned the arrival of Vettel, who along with Red Bull, his current team, have both denied that the 25-year-old has any pre-existing agreements with Ferrari, and insist the German will see out his current contract, which runs until the end of 2014.

Vettel leads the drivers championship with 215 points, six points ahead of Alonso, following his victory in Sunday's Korean Grand Prix. Red Bull lead the constructors' championship with 367 points, 77 points ahead of Ferrari.