Singapore GP: Sebastian Vettel fastest in second practice

Championship leader Vettel and Webber swapped the top spot repeatedly on the soft-compound tyres early on. Webber won that battle, with a time of 1m46.157s giving him a 0.251-second advantage over the German, who had just usurped his original mark.

Vettel blew that pace away when he moved onto supersofts and lapped in 1m44.249s.

Webber's response was compromised by a firm clout of the wall near the end of the lap, leaving him 0.604s down in the end.

Third-placed Nico Rosberg, who pipped Mercedes team-mate Lewis Hamilton by 0.110s, was a second off Vettel's pace.

Steering and brake issues again limited Romain Grosjean's mileage, but did not stop him putting his Lotus fifth - just 0.043s behind Hamilton - during what little running he managed.

That placed him ahead of Fernando Alonso and Jenson Button in the top Ferrari and McLaren respectively, and Kimi Raikkonen in the second Lotus.

Adrian Sutil and Sergio Perez completed the top 10.

Bar minor brushes such as Webber's, everyone managed to stay away from the barriers with the exception of Pastor Maldonado, whose Williams required a new front wing.

Pos Driver                Team                    Time        Gap    Laps
 1. Sebastian Vettel      Red Bull-Renault        1m44.249s           34
 2. Mark Webber           Red Bull-Renault        1m44.853s  +0.604s  30
 3. Nico Rosberg          Mercedes                1m45.258s  +1.009s  34
 4. Lewis Hamilton        Mercedes                1m45.368s  +1.119s  33
 5. Romain Grosjean       Lotus-Renault           1m45.411s  +1.162s  18
 6. Fernando Alonso       Ferrari                 1m45.691s  +1.442s  32
 7. Jenson Button         McLaren-Mercedes        1m45.754s  +1.505s  30
 8. Kimi Raikkonen        Lotus-Renault           1m45.778s  +1.529s  32
 9. Adrian Sutil          Force India-Mercedes    1m46.002s  +1.753s  27
10. Sergio Perez          McLaren-Mercedes        1m46.025s  +1.776s  31
11. Daniel Ricciardo      Toro Rosso-Ferrari      1m46.406s  +2.157s  34
12. Jean-Eric Vergne      Toro Rosso-Ferrari      1m46.429s  +2.180s  33
13. Paul di Resta         Force India-Mercedes    1m46.606s  +2.357s  33
14. Nico Hulkenberg       Sauber-Ferrari          1m46.808s  +2.559s  36
15. Felipe Massa          Ferrari                 1m46.870s  +2.621s  33
16. Esteban Gutierrez     Sauber-Ferrari          1m47.287s  +3.038s  29
17. Valtteri Bottas       Williams-Renault        1m47.434s  +3.185s  33
18. Pastor Maldonado      Williams-Renault        1m47.761s  +3.512s  25
19. Giedo van der Garde   Caterham-Renault        1m49.434s  +5.185s  34
20. Charles Pic           Caterham-Renault        1m49.526s  +5.277s  34
21. Max Chilton           Marussia-Cosworth       1m49.619s  +5.370s  33
22. Jules Bianchi         Marussia-Cosworth       1m49.731s  +5.482s  30