Lewis Hamilton led the way in the opening Friday practice session at the Singapore Grand Prix.
As the night fell in the city-state the cars came out in a session dominated by the top two teams in F1 at the moment.
Both Mercedes and Mark Webber alternated the top three positions for around 20 minutes before Hamilton came out on top with a 1:47.055, Webber settled for second .365 behind the Briton.
Sebastian Vettel joined in the action a little later moving up to third with Nico Rosberg completing the top 4.
The two Lotuses of Kimi Raikkonen and Romain Grosjean popped in just behind with Fernando Alonso 7th. Sergio Perez, Jean-Eric Vergne and Esteban Gutierrez completed the top 10.
Notables outside the top 10 include Felipe Massa who was 12th for Ferrari over a second slower than his team-mate, Jenson Button in 14th for McLaren and future Red Bull driver Daniel Ricciardo in 18th for Toro Rosso.
The session went off largely without incident with only a handful of driver's out-braking themselves and heading down the escape roads and there was the usual moments with driver's brushing the walls particularly towards the end of the lap.
As with all street circuits the amount of improvement in lap time as the track was cleaned and rubber laid down was much bigger than at most circuits with lap times dropping some four seconds as driver's pushed harder.
The final half an hour was dominated by drivers completing longer runs on higher fuel to test the durability of the medium compound, most are expecting a two-three stop strategy to be used on Sunday.
The second practice sessions starts at 2:30BST where the driver's will switch focus to the super-soft tyres, the first time they have been used since Canada and we will get an idea of the performance gap between the two compounds and an indication on who has the better race pace.
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