Red Bull Racing's Sebastian Vettel laid down the marker in second practice for the Singapore Grand Prix as he looks for his third race win in a row in the 'Lion City'.
Vettel had to settle for the third best time in the opening session around the Marina Bay Street Circuit, but on his first lap on the supersofts in P2, he shot to the head of the leaderboard.
His time eventually left him 0.604 seconds up on team-mate Mark Webber, who survived a brush with the wall en-route
Webber was the only other driver to break the 1m 45s barrier, while Nico Rosberg took third for Mercedes, albeit 0.405 seconds off P2 – and just over a second off P1.
Lewis Hamilton was next up, 0.110 seconds behind Rosberg, but unable to do enough to repeat the feat that saw him end the first session quickest.
Romain Grosjean rounded out the top-five for Lotus, despite steering issues which limited him to just 18 laps – compared to the 30-odd tours managed by most of the other drivers.
Ferrari number one driver Fernando Alonso was sixth, three tenths off P5 and alarmingly 1.442 seconds off championship rival, Vettel. At least he put it his F138 at the top end of the times though, unlike Felipe Massa, who finished up down in P15 in the sister car and who also 'kissed' the wall near the end.
McLaren's Jenson Button and Lotus pilot Kimi Raikkonen took seventh and eighth, ahead of Force India's Adrian Sutil and Sergio Perez.
Behind, Toro Rosso's Daniel Ricciardo and Jean-Eric Vergne concluded the day just on the fringes of the top-ten, with Paul di Resta 13th, followed by Monza star Nico Hulkenberg and then Massa and the other Sauber of Esteban Gutierrez.