2009 Formula One World Championship joined Brawn as a test driver. Force India joined Brawn GP in using the Mercedes engines by signing a five-year deal until 2013, having ended their previous supply contract from Ferrari. The retirement of Red Bull Racing driver David Coulthard led to the appointment of Sebastian Vettel as his replacement, who left the Scuderia Toro Rosso team after a successful previous season including winning the Italian Grand Prix. Toro Rosso, a team designed to develop new Formula One drivers, saw co-owner Gerhard Berger sell his half-stake back to Red Bull, claiming that the new regulations would "leave no room for
Sebastian Vettel third, Vettel went into the final race of the season with a 15-point deficit to Alonso, and a 7-point gap to Webber. With the 1–2 finish in Brazil, Vettel and Webber secured Red Bull Racing's first Formula One World Constructors' Championship. He won the from pole again, to take the Drivers' Championship lead for the first time in his career and became the youngest world champion in the sport's history. Following John Surtees in the season and James Hunt in , this was also only the third time in Formula One history when the World Champion had not been championship