Sebastian Vettel made a perfect start to the 2012 F1 Indian Grand Prix on Friday by setting the pace in both practice sessions.

The Red Bull Racing pilot, who took the lead in the drivers' championship following his third victory in a row last time out in Korea, finished the opening session at the Buddh International Circuit this morning three tenths up on Jenson Button.

Vettel was then quickest again in the afternoon, one tenth up on team-mate, Mark Webber, his best lap a 1 minute 26.221 seconds. Despite such a good start though, the 25-year-old remained cautious.

"Friday's are always difficult with so many things changing. The track improvement was quite big today, it was dusty to start and improved lap by lap, so I wouldn't be surprised if tomorrow the order is different, but we've had worse Fridays, so I am happy," he remarked.

"We need to keep working though, and improve a little bit overnight," added the two-time world champion.

Webber meanwhile also had a pretty positive day, and from being fifth fastest in P1, he improved to finish 'best of the rest' behind his team-mate in P2.

"That went pretty well. I had a lock-up in Turn 1, which I could have done without, but it wasn't the end of the world," he continued.

"We got on with the important stuff, which is understanding the soft tyre on short and long runs. We'll have a look where we can improve the car, you can always improve. The team is incredibly motivated and the drivers also," the Aussie concluded.