Vettel explains Indian Grand Prix win was 'never easy'

Sebastian Vettel explains his Indian Grand Prix victory was "never easy" despite leading from lights to flag.

The reigning world champion came home ahead of Ferrari's Fernando Alonso to extend his lead in the drivers' championship to 13 points with three races remaining.

The win in India is Vettel's fourth in a row - the first time the Red Bull driver has achieved the feat.

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Formula 1