Nico Rosberg set the fastest time of final practice for the Russian Grand Prix as a heavy crash for Carlos Sainz ended the session prematurely.

With 25 minutes still to run, Sainz went off at Turn 13 - a tight right hander at the end of a DRS zone - with his car becoming embedded below the tecpro barrier. The session was red flagged with the medical car responding to the incident and was not restarted while Sainz was extricated from his car.

The FIA confirmed Sainz was conscious and TV pictures showed him giving the thumbs up from a stretcher as he was being loaded in to the back of an ambulance.

Sainz's crash came following a very busy start to the session as teams finally got some dry running after rain on Friday. The Williams pair of Valtteri Bottas and Felipe Massa had set the early pace before Rosberg set the benchmark with a 1:38.561 on the supersoft tyre.

Bottas ended the session second fastest, 0.726s slower than Rosberg, with Lewis Hamilton 0.1s further back in third place. Hamilton's first timed lap on supersofts was ruined by a big lock-up in to Turn 2, causing him to run wide and flat-spotting his front tyres.

Sergio Perez was fourth ahead of Massa and Nico Hulkenberg, with Mercedes-powered cars dominating the top of the timing screens. The first non-Mercedes car was actually a Honda, with Jenson Button seventh for McLaren ahead of Pastor Maldonado, Fernando Alonso and Felipe Nasr.

The two Ferrari drivers had yet to set representative times on the supersoft tyre when the session was halted having sat in the garage for the opening 14 minutes. The lack of dry running means teams will be left with little data to prepare their cars for qualifying.

Sainz's Toro Rosso team-mate Max Verstappen also had an eventful session, spinning at the final corner and having to recover to the inside of the track having initially stopped on the exit kerb. A number of other drivers ran wide at various corners as grid levels remained low.

Big Sainz crash halts FP3 in Sochi

AS IT HAPPENED: Russian Grand Prix FP3

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Pos Driver Team Time Laps
01 Nico Rosberg Mercedes 1:38.561 15
02 Valtteri Bottas Williams 1:39.287 17
03 Lewis Hamilton Mercedes 1:39.363 13
04 Sergio Perez Force India 1:39.616 14
05 Felipe Massa Williams 1:39.875 14
06 Nico Hulkenberg Force India 1:39.917 14
07 Jenson Button McLaren 1:40.581 12
08 Pastor Maldonado Lotus 1:40.767 13
09 Fernando Alonso McLaren 1:41.200 11
10 Felipe Nasr Sauber 1:41.229 14
11 Daniil Kvyat Red Bull 1:41.358 15
12 Kimi Raikkonen Ferrari 1:42.297 11
13 Romain Grosjean Lotus 1:42.371 14
14 Marcus Ericsson Sauber 1:42.450 14
15 Carlos Sainz Toro Rosso 1:42.683 19
16 Sebastian Vettel Ferrari 1:42.686 11
17 Max Verstappen Toro Rosso 1:43.089 16
18 Daniel Ricciardo Red Bull 1:43.347 14
19 Roberto Merhi Manor 1:46.767 19
20 Will Stevens Manor 1:47.249 18
Andrew Lewin

Andrew first became a fan of Formula 1 during the time when Michael Schumacher and Damon Hill were stepping into the limelight after the era of Alain Prost, Nigel Mansell and Aryton Senna. He's been addicted ever since, and has been writing about the sport now for nearly a quarter of a century for a number of online news sites. He's also written professionally about GP2 (now Formula 2), GP3, IndyCar, World Rally Championship, MotoGP and NASCAR. In his other professional life, Andrew is a freelance writer, social media consultant, web developer/programmer, and digital specialist in the fields of accessibility, usability, IA, online communities and public sector procurement. He worked for many years in magazine production at Bauer Media, and for over a decade he was part of the digital media team at the UK government's communications department. Born and raised in Essex, Andrew currently lives and works in south-west London.

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