• Hamilton quickest ahead of Sebastian Vettel and Nico Rosberg
• Button qualifies 12th two places behind Rubens Barrichello
Lewis Hamilton secured pole for the Singapore grand prix but there was disappointment for championship leader, Jenson Button, whose world title hopes were dealt a blow by qualifying in 12th place on the grid.
Hamilton, whose engineers worked through the night to fit a new chassis for his McLaren, impressed in practice and took that form into qualifying as he clocked a time of 1min 47.891sec in Q3 at the Marina Bay street circuit.
In contrast, Button had struggled in practice after his Brawn car had been switched to the same set-up as team-mate Rubens Barrichello. Though they reverted it to yesterday's settings, the 29-year-old failed to threaten, with Sebastian Vettel's Red Bull taking second and the Williams of Nico Rosberg third.
Barrichello, who will be looking to cut into Button's 14-point lead tomorrow, was fifth fastest before crashing with 26 seconds of qualifying remaining but will start from 10th on the grid tomorrow after being hit with a five-place grid penalty for changing his gearbox prior to the session.
1 Lewis Hamilton (Gbr) McLaren 1min 47.891secs, 2 Sebastian Vettel (Ger) Red Bull 1:48.204, 3 Nico Rosberg (Ger) Williams 1:48.348, 4 Mark Webber (Aus) Red Bull 1:48.722, 5 Rubens Barrichello (Bra) Brawn GP 1:48.828, 6 Fernando Alonso (Spa) Renault 1:49.054, 7 Timo Glock (Ger) Toyota 1:49.180, 8 Nick Heidfeld (Ger) BMW Sauber 1:49.307, 9 Robert Kubica (Pol) BMW Sauber 1:49.514, 10 Heikki Kovalainen (Fin) McLaren 1:49.778, 11 Kazuki Nakajima (Jpn) Williams 1:47.013, 12 Jenson Button (Gbr) Brawn GP 1:47.141, 13 Kimi Raikkonen (Fin) Ferrari 1:47.177, 14 Sebastien Buemi (Swi) Scuderia Toro Rosso 1:47.369, 15 Jarno Trulli (Ita) Toyota 1:47.413, 16 Adrian Sutil (Ger) Force India 1:48.231, 17 Jaime Alguersuari (Spa) Scuderia Toro Rosso 1:48.340, 18 Giancarlo Fisichella (Ita) Ferrari 1:48.350, 19 Romain Grosjean (Fra) Renault 1:48.544, 20 Vitantonio Liuzzi (Ita) Force India 1:48.792
Note: Rubens Barrichello will start the race in 10th position following a five place penalty for a gearbox replacement.
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