Lewis Hamilton vaulted to the top of the time sheets for Mercedes during the second practice session for the Russian Grand Prix.
Hamilton posted a time of 1:37.583 on the Super Soft tyres, following an earlier spin at Turn 4, to finish almost seven-tenths clear of Ferrari’s Sebastian Vettel.
Vettel recorded his lap on Super Soft tyres half an hour into running but soon after suffered a suspected electronics issue and his SF16-H crawled to a halt exiting the final corner.
Marshals wheeled Vettel’s car back to the pit lane and the German was unable to compete in the remainder of the session.
Nico Rosberg was third fastest for Mercedes after failing to get register a clean lap on Super Soft tyres, as Kimi Räikkönen finished fourth.
Daniel Ricciardo’s time for Red Bull came on the Soft tyre as he finished fifth, 1.5 seconds adrift of Hamilton, while Valtteri Bottas edged out Daniil Kvyat for sixth, the pair separated by 0.008s.
McLaren finished the session with Jenson Button in eighth and Fernando Alonso 10th, split by the Williams of Felipe Massa.
Carlos Sainz Jr. and Max Verstappen were 11th and 12th respectively for Toro Rosso, ahead of Force India pair Nico Hülkenberg and Sergio Pérez.
Kevin Magnussen returned to the cockpit of the Renault RS16 and finished 15th, half a second and three places in front of team-mate Jolyon Palmer.
The Renault pair sandwiched Haas’ Romain Grosjean and Esteban Gutiérrez, the Frenchman finishing three-tenths ahead of his team-mate despite spinning at Turn 8.
Felipe Nasr claimed 19th, while both Manor drivers spun early on in the session.
Rio Haryanto pirouetted at Turn 16 as Pascal Wehrlein lost the back end of his MRT05 at Turn 7, before recovering to 20th and 21st overall.
Wehrlein stopped on track at the end of the session after losing power exiting Turn 15.
Marcus Ericsson finished at the back of the pack, half a second behind Wehrlein and nine-tenths adrift of Nasr.