21 September 2012 Last updated at 17:27

Formula 1 - Singapore Grand Prix second practice highlights

Sebastian Vettel goes fastest for Red Bull in second practice at Singapore's Marina Bay street circuit.

The reigning world champion was 0.311 seconds ahead of McLaren's Jenson Button, with championship leader and two-time Singapore winner Fernando Alonso third-fastest.

Vettel will be attempting to reduce his 39-point deficit to Alonso in the race for the championship during Sunday's gruelling 61-lap Grand Prix.

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