Singapore GP: Ricciardo leads Vettel in FP1

Ricciardo posted a 1m42.489s on the second flying lap on his second set of ultrasofts to secure top spot with 26 minutes remaining of the one-and-a-half hour session.

Vettel, also on his second flier on ultrasofts, posted a time 0.109s slower to take second five minutes later to deny Red Bull a one-two by relegating Max Verstappen to third place.

Mercedes drivers Valtteri Bottas and Lewis Hamilton had set the pace during the early stages of the session using supersoft Pirelli rubber, when there were a few damp patches on the circuit, but all drivers used slicks before they were shuffled back by Verstappen and Ricciardo's first-run pace.

Bottas then capitalised on a near-empty track on fresh ultrasofts to climb to second briefly, but he was eventually pushed down to sixth place, half-a-second slower than teammate Hamilton and behind Force India driver Sergio Perez, who set his time with 15 minutes to go.

During the long runs, Bottas complained of a lack of rear grip, while Hamilton had a brief off at the slow Turn 14 right-hander.

Kimi Raikkonen ended up seventh, lapping 1.245s slower than pacesetter Ricciardo.

Fernando Alonso was eighth for McLaren, ahead of Renault's Nico Hulkenberg, with Toro Rosso driver Daniil Kvyat rounding out the top 10 after Stoffel Vandoorne failed to improve by enough with his late-session pace to get ahead of the Russian.

Felipe Massa was the best-placed of the Williams drivers in 14th, while Lance Stroll completed only 10 laps before pitting with a gearbox problem and ended up 17th.

Massa was ahead of the two Haas drivers, who were the only ones not to use ultrasoft Pirellis and concentrated on supersofts.

Grosjean set his best time with five minutes remaining, although suffered three off-track moments during the session - taking to the run-off at Turn 1 early on before a spin at Turn 16 shortly after and then going off at Turn 18 late on.

He was just over three tenths faster than Antonio Giovinazzi, the latter sitting in for race driver Kevin Magnussen during FP1.

Formula 2 driver Sean Gelael made his grand prix weekend debut in place of Carlos Sainz at Toro Rosso for the first free practice session.

The 20-year-old Indonesian, who is currently 15th in the F2 standings, was 18th fastest with a 1m45.570s – complaining of a possible problem with the front left that caused "no grip" in the final 20 minutes.

He outpaced the two Saubers, with Marcus Ericsson – who suffered a spin in the Turn 18 left-hander early in the session – 0.187s ahead of teammate Pascal Wehrlein.

Cla	Driver	Chassis	Engine	Laps	Time	Gap
1	Daniel Ricciardo	Red Bull	TAG	21	1'42.489
2	Sebastian Vettel	Ferrari	Ferrari	21	1'42.598	0.109
3	Max Verstappen	Red Bull	TAG	23	1'42.610	0.121
4	Lewis Hamilton	Mercedes	Mercedes	27	1'42.904	0.415
5	Sergio Perez	Force India	Mercedes	25	1'43.423	0.934
6	Valtteri Bottas	Mercedes	Mercedes	27	1'43.434	0.945
7	Kimi Raikkonen	Ferrari	Ferrari	25	1'43.734	1.245
8	Fernando Alonso	McLaren	Honda	19	1'43.759	1.270
9	Nico Hulkenberg	Renault	Renault	24	1'44.101	1.612
10	Daniil Kvyat	Toro Rosso	Renault	25	1'44.220	1.731
11	Stoffel Vandoorne	McLaren	Honda	25	1'44.340	1.851
12	Jolyon Palmer	Renault	Renault	25	1'44.961	2.472
13	Esteban Ocon	Force India	Mercedes	25	1'45.053	2.564
14	Felipe Massa	Williams	Mercedes	27	1'45.084	2.595
15	Romain Grosjean	Haas	Ferrari	20	1'46.456	3.967
16	Antonio Giovinazzi	Haas	Ferrari	27	1'46.782	4.293
17	Lance Stroll	Williams	Mercedes	11	1'47.190	4.701
18	Sean Gelael	Toro Rosso	Renault	26	1'47.570	5.081
19	Marcus Ericsson	Sauber	Ferrari	23	1'47.699	5.210
20	Pascal Wehrlein	Sauber	Ferrari	24	1'47.886	5.397