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
Formula One many F1 drivers, with champions, including Nigel Mansell, Ayrton Senna and Mika Häkkinen having moved straight from that series to Formula One. More rarely a driver may be picked from an even lower level, as was the case with 2007 World Champion Kimi Räikkönen, who went straight from Formula Renault to F1, as well as Max Verstappen, who made his debut following a single season in European F3. American open-wheel car racing has also contributed to the Formula One grid with mixed results. CART champions Mario Andretti and Jacques Villeneuve became F1 World Champions, while Juan Pablo Montoya won seven