Raikkonen tips friend Vettel to keep title lead

Stephan Heublein

Kimi Raikkonen has tipped his friend Sebastian Vettel to pip F1's class of 2011 to become world champion for the second time.

In 2007, former Ferrari driver Raikkonen came from a long way behind to beat the feuding McLaren duo Lewis Hamilton and Fernando Alonso to the championship at the final race of the season.