Lewis Hamilton produced a dominant display ahead of qualifying for the Singapore Grand Prix as he topped the timesheet in final free practice on Saturday.
The reigning world champion had produced indifferent performances in practice on Friday and had complained about the bumpiness of the Marina Bay street circuit earlier in the day.
However, Hamilton's McLaren was sporting a new chassis after his team fixed an electrical problem overnight and he showed plenty of pace, spending the vast majority of the session at the top of the timesheet before claiming P1 for good with a time of one minute 47.632 seconds late in the session to edge Red Bull's Sebastian Vettel.
Vettel, hoping to keep alive his slim world championship hopes, had gone fastest in second free practice and again produced another impressive performance with a time of 1:47.909secs, just 0.277s slower than Hamilton.
Championship leader Jenson Button, however, could only manage the 14th fastest time in his Brawn GP and was 1.289 seconds slower than Hamilton with his time of 1:48.921.
Williams' Nico Rosberg, who finished second at the inaugural night race in Singapore last year, enjoyed a good session by going third fastest while McLaren's Heikki Kovalainen's confident displays in practice continued as he finished fourth with the BMW Saubers of Robert Kubica and Nick Heidfeld fifth and sixth fastest respectively.
Brawn GP's Rubens Barrichello, hoping to close the gap on team-mate Button at the top of the drivers' championship on Sunday, was seventh while the Toyota's of Timo Glock and Jarno Trulli were eighth and 10th respectively with Sebastien Buemi of Toro Rosso sandwiched in-between.
Ferrari's Kimi Raikkonen was 12th fastest while Renault's Fernando Alonso, tipped to potentially replace the Finn next season, was unable to build on a promising second session yesterday as he was 15th fastest.