Vettel, Alonso confident ahead of Indian GP

Vettel's victory in the series' previous race in Korea made it three straight grand prix wins, snatching the drivers' championship lead from Alonso, who had led by as much as 40 points before the German's winning streak.

The Indian track — the Buddh International circuit about an hour outside New Delhi — has similar characteristics to that of Korea: long straights in the early part of the lap followed by more twisting, technical sections.

The Buddh circuit has some fast, sweeping corners, which usually suit the Red Bull more than its rivals, and Vettel is eager to get back on the Indian track where he won the inaugural race last year.

"I loved the track layout last year, but not just because I won the race," Vettel said. "The course is the second quickest of the year after Monza. There is a lot of elevation change around the lap which adds to the fun...it's like a roller coaster.

"It really has emerged as one of the most challenging circuits on the calendar for the drivers."

Ferrari, however, believes it has cured the wind-tunnel problems that have slowed its scarlet cars to rivals, and expects that should allow it to catch up to Red Bull over the remaining races.

The Italian team has altered its wind tunnel after finding its upgrades at the past two races haven't worked on the track as they did back at the Maranello headquarters.

"We got some very interesting answers which we believe will allow us to recover from those problems and so, our aim in this forthcoming Indian GP, will be to make up the ground we have lost," Ferrari chief designer Nicolas Tombazis said.