Germany's Vettel secured the 2010 title on the final race of the season in Abu Dhabi, while teammate Webber eventually finished in third place. Red Bull's sister team Toro Rosso, and rivals Mercedes and Williams, also revealed their 2011 challengers on day one of the three-day pre-season testing session.įerrari presented their new car in Italy last Friday, while CNN-sponsored Team Lotus, Renault and Sauber unveiled their vehicles in Spain on Monday. World champion Sebastian Vettel will once again team-up with Australia's Mark Webber at Red Bull - the third year of their partnership with the Austrian-owned team. The team launched their new RB7 car in Valencia, Spain, on Tuesday - the venue for the first of four tests ahead of the season-opening Bahrain Grand Prix on March 13.

(CNN) - Reigning Formula One champions Red Bull have unveiled the car they hope will help them retain their place at the top of the drivers' and constructors' standings in 2011.

2011 F1 season begins at the Bahrain Grand Prix on March 13.

Toro Rosso, Mercedes and Williams also unveiled new cars ahead three-day testing session.

Team hope RB7 will allow them to defend the drivers' and team titles they won in 2010.

Red Bull launch 2011 challenger at pre-season testing in Valencia, Spain on Monday.

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