Sebastian Vettel issued an early warning that he is in no mood to let up on his recent run of success after topping the timesheets in the opening practice session for this weekend's Indian Grand Prix.

While McLaren team-mates Lewis Hamilton and Jenson Button took turns to lead the way early in the 90-minute session, Vettel eventually emerged on top by three-tenths over the latter after posting a 1min 27.619secs effort right at the end. Hamilton, however, was on an equally fast lap when he decided to pit and could have matched the German. The Briton eventually ended the morning in fourth spot, behind Ferrari's Fernando Alonso, who fitted both front and rear wing developments towards the end of the session, squeezing between the McLarens with a time of 1min 28.044secs and edging his former team-mate by just 0.002secs.

Mark Webber also took a turn at the top of the times in an incident-free session, but was restricted to fifth at the chequered flag, half a second off Vettel's pace but comfortably ahead of Nico Rosberg and Felipe Massa, the final drivers within a second of Vettel's pace. Michael Schumacher, Daniel Ricciardo and Kimi Raikkonen rounded out the top ten.

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