Sebastian Vettel says third world championship is 'unreal'

Sebastian Vettel discusses winning an "unreal" third world championship title after a dramatic Brazilian Grand Prix.

The Red Bull driver jokes that he was happy his radio failed at the end of the race so the media could not hear him crying, as the impact of equalling the achievement of "one of his greatest idols" Ayrton Senna hit home.

Vettel recovered from last position following a first-lap collision with Bruno Senna's Williams to claim sixth place and a third successive world championship.

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