Though rain was forecast for later in the weekend, the Brazilian Grand Prix commenced with clear skies, a dry track and hot temperatures - plus a Red Bull versus McLaren battle.
It was Mark Webber who came out on top for the champion team, his 1m13.811s lap edging out McLaren's Jenson Button by 0.014s.
Lewis Hamilton was next up, with Sebastian Vettel fourth - and neither of them were overwhelmingly happy with their cars. The Ferraris completed the top six, Felipe Massa faster than a frowning Fernando Alonso, who had various issues culminating in an engine failure in the closing minutes of the session.
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