Motor Sport: Rubens Barrichello was fastest in floodlit first free practice for the Singapore Grand Prix ahead of Brawn GP team mate and championship rival Jenson Button.
In a session that was briefly halted when French rookie Romain Grosjean crashed his Renault at the same corner where Nelson Piquet deliberately smashed into the wall a year ago, Barrichello lapped in one minute 50.179 seconds.
Barrichello trails Button by 14 points in the standings with four races left.
The Brawns, who completed a one-two finish at the last race in Monza, appear to have rediscovered their early season dominance ahead of Sunday's night race.
Button lapped 0.177 seconds slower than his team mate with Red Bull's Mark Webber, his title hopes hanging by a thread, third fastest in 1:50.416.
Fernando Alonso, the winner of last year's scandal-tainted race, shrugged off the withdrawal of Renault's main sponsors a day earlier by clocking the fourth fastest time in a car hastily stripped of its ING and Mutua Madrilena markings.
The McLarens of Heikki Kovalainen and Lewis Hamilton also looked competitive, the pair clocking the sixth and seventh fastest times behind Red Bull's Sebastian Vettel.
However, it was the amazing flashback to that inaugural 2008 race that formed the highlight of the session when Grosjean lost control on turn 17 of the Marina Bay Street Circuit and slammed into the opposite wall.
Renault were handed a suspended permanent ban for race-fixing earlier this week after Piquet confessed to crashing on purpose last year in a plot to help Alonso win after the safety car was deployed.
Grosjean, who replaced Piquet in August and was passed fit only this morning after feeling unwell on Thursday, had completed nine laps when he crashed. He has not previously raced at the track.
The circuit was cleared nine minutes after the crash and practice resumed with 36 minutes remaining. A second session will take place later today.