Sebastian Vettel could become a four-time F1 champion if results go his way in this morning's Indian Grand Prix.

The Red Bull driver will start on pole position with Fernando Alonso - the only man who can stop him being crowned - down in eighth place on the grid.

But what does Vettel - who is 90 points clear - need to do to lift the crown for a fourth successive season?

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First to fifth: Vettel will be champion regardless of where Alonso finishes.

Even if Alonso is victorious, he would be 75 points behind with a maximum of 75 points available, but would be unable to match Vettel's tally of victories - meaning Alonso could win the final three races with Vettel failing to score and it still wouldn't be enough.

Sixth to Eighth: Vettel will be champion if Alonso fails to win

Ninth or lower: Vettel will be champion if Alonso fails to finish in the top two

If Vettel wins the race, it would also secure the constructors' championship for Red Bull Racing, who need to score 24 points from the weekend to put themselves out of reach of Ferrari.

The team has failed to achieve that tally on only four occasions all season, in Australia, China, Spain and Great Britain.