The Brawn team, formed as a result of a management buyout of the Honda team, won six of the first seven races, their ability to make the most of the new regulations being a deciding factor in the Championship. The Red Bull, McLaren and Ferrari teams caught up in an unpredictable second half of the season, with the season being the first time since that all participating teams had scored World Championship points. Sebastian Vettel and Button's teammate Rubens Barrichello were his main challengers over the season, winning six races between them to finish in second and third respectively.