Formula 1: 5 live's James Allen on Sebastian Vettel's move

Ferrari may lodge a protest against Red Bull driver Sebastian Vettel's Formula 1 championship win after a possible illegal overtaking move, as 5 live's James Allen explains.

Fernando Alonso lost the title by three points to Vettel after finishing second for Ferrari with the German seventh in Sunday's Brazilian Grand Prix.

The Italian team are "evaluating footage" but governing body the FIA has refused to confirm whether it is investigating.

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