World champion Sebastian Vettel suffered another blow in his bid to win a race this season when an engine problem forced him to miss all but seven minutes of second practice at the Singapore Grand Prix.

The German pulled off immediately after crossing the line to take the chequered flag in FP1, matter-of-factly reporting that he had suffered the failure to the Red Bull team. With a shorter two-hour interval between sessions, Vettel's crew was always going to be up against it to install another powerplant in time for any meaningful running in the second session, but completed their task and sent the driver out with seven minutes remaining.

In the time he had, Vettel vaulted straight into fifth place with his first flying lap on Pirelli's supersoft tyre, and then proceeded to chip away at the mark, without improving his position, on subsequent tours.

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"It's Friday but it's not ideal not to get a run on the options," he sighed, However, we got a first feel and, thanks to the mechanics, I got a couple of laps at the end, which was better than nothing.

"[The new chassis] felt very good this morning but, obviously, this afternoon, it was difficult to go out and nail the first lap right away, but I think we got very close. I wasn't able to get the best out of the tyres straight away, but I was pretty happy and I'm sure we can improve the car and should be in a good place tomorrow. Qualifying is tight, but we'll see what we can do."