2013 Singapore Grand Prix Saturday practice

9 min: Having opted for a cooling lap, Pic's back on it. He sets an identical time as Sutil to go second!

9 min: Webber came in after one lap and has remained in the garage. Vettel stopped briefly, but is back out there again for a second tour of the circuit.

8 min: Sutil is also on what looks to be his first timed lap of the day in the Force India. His team-mate di Resta is still in the garage.

6 min: As Pic goes onto his third lap, van der Garde starts a first flier. The Caterhams looking for some early running.

5 min: As we say that, Webber heads out to check over the condition of his car, followed out by Vettel a few seconds later.

5 min: Rosberg is also on the circuit in the other Mercedes, leaving Webber, Vettel and di Resta as the only drivers left to emerge.

4 min: Pic has continued for a second lap.

4 min: Ricciardo reports over the team radio following his installation run that his brakes are poor. The Toro Rosso mechanics will now look into this.

4 min: Sergio Perez brings the second McLaren onto the circuit, as Giedo van der Garde joins Caterham team Pic on track.

4 min: Track temperature is up at 34 degrees in the early stages. This will gradually decrease as we go through the evening.

3 min: The two Ferraris, along with Jenson Button's McLaren, are out for their installation laps.

3 min: The early runners are back into the pits at the completion of one lap, as Hamilton joins the racetrack.

3 min: The second Lotus of Romain Grosjean is out for an installation lap.

2 min: Kimi Raikkonen's Lotus and Charles Pic's Caterham joins the early running.

2 min: Ricciardo, Bottas, Maldonado and Vergne are out on the circuit for an installation run.

1 min: Gutierrez's Sauber team-mate Nico Hulkenberg is also out early, as is Marussia pair Jules Bianchi and Max Chilton.

1 min: Ricciardo is advised over the team radio that there is still a lot of marbles left on the circuit from the GP2 race, which Jolyon Palmer sensationally won earlier this afternoon.

0 min: Esteban Gutierrez is eager and leads the first cars onto the track.

0 min: The practice session is underway.

Jenson Button gets strapped into his McLaren having adorned his helmet and HANS device.

Hamilton is in his Mercedes and all set to go when the pitlane opens. He is clearly eager to get down to business today.

Conditions are overcast around the 5.073km Marina Bay circuit, but other than that the forecast is similar to yesterday.

It will remain dry this evening for final practice and qualifying, although remaining overcast. There is a light south-easterly breeze and air temperature will dip from today's maximum of 32 Celsius, down to around 30 degrees by the time qualifying ends.

The official sunset time today is 19:01, so we will start final practice in the early evening sun, with the artificial lights taking over through the second half of the session as we move towards dusk.

Hello everyone and welcome to AUTOSPORT Live, as we continue with the story of round 13 in this year's FIA Formula 1 world championship - the Singapore Grand Prix night event.

Championship leader Sebastian Vettel blazed a trail in second practice last night, putting distance between himself and the restof the field with an impressive lap of 1m44.249s in the Red Bull. He was 0.6.04s clear of team-mate Mark Webber, with Nico Rosberg more than one second adrift in third and Lewis Hamilton was fourth.

Romain Grosjean was plagued by a braking issue for much of the evening, but he recovered well to end up in fifth spot, just ahead of title challenger Fernando Alonso.

Vettel fastest in second practice

The teams and drivers have just 60 minutes now to fettle the cars, find the optimum balance and the best compromise between raw pace and tyre durability in both high and low fuel trim.