Sebastian Vettel declared himself happy with the opening day of running for the Singapore Grand Prix, although the German's Red Bull Racing team suffered a mixed evening under lights at the challenging street circuit.

Having only turned limited laps during the opening session, Vettel was one of the busiest men on track during FP2, completing more than 30 laps and ending up with the quickest time of the day.

While circuit changes meant that time was slower than those set last year, Vettel was happy with the day and said he was pleased to see the team back on the pace after a tough weekend last time out at Monza.

"We can see from the times that the track is a little bit slower here than it was last year, which is a shame because some of the faster corners are now not so quick, but overall the character has remained the same. It's a challenging track - quite stop and go - you don't experience as much G-force here as on other circuits, but there are a lot of bumps, which don't make your life easy, but I like the circuit a lot. Overall, it was a good day for us and we look better here than we did in Monza."

Team-mate Mark Webber however suffered a more troubled day after he suffered a spin into the barriers in the second session, although he was still able to set the sixth quickest time.

Although disappointed to have ended his session on the sidelines, the Australian agreed with Vettel that the team is in good shape so far.

"I was pushing a little bit too hard in the second practice, it was a bit slippery off line and I went off in the last corner and into the pit wall, which ended my session," he said. "The car was going well up until then; I was quick and both Sebastian and I had pretty good practice sessions. I would have liked to have done a bit more mileage, but in the end we still learned quite a bit and we'll be back tomorrow. I think it should be a good race for us, it will be interesting as the tyres are not massively easy to handle here, so we'll have to work on that tonight. But, overall, not too bad."