Webber on top in free practice
Mark Webber topped the times for Red Bull in the morning's opening free practice session for Sunday's season-ending Brazilian GP.
The Australian is yet to win a race this season. Nonetheless, the 35-year-old, who won in Brazil in 2009, clocked a lap of the Interlagos circuit in one minute 13.811 seconds towards the end of the session, edging out rival Jenson Button of McLaren by 0.014 seconds.
Button was followed by his McLaren teammate patriot Lewis Hamilton and Vettel in the second Red Bull.
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