Ferrari's Charles Leclerc topped the time charts in the opening practice session for the Russian Grand Prix.

Leclerc edged out Red Bull driver Max Verstappen by just 0.082 seconds at the Sochi Autodrome.

Lewis Hamilton, who holds a 65-point championship lead heading into the final six rounds, finished fifth.

Hamilton ran off the road at Turn 2 in the opening exchanges before complaining about his brakes.

His Mercedes mechanics made alterations to his car, but the British driver was unable to reduce the deficit to Leclerc at the summit of the standings.

Neither Hamilton nor Bottas posted a time on the quicker soft tyre, however, to suggest there will be more time to come from Mercedes in the day's concluding running.

Daniel Ricciardo broke his rear wing after a late crash. The Renault driver lost control of his car through the right-handed Turn 10 before sliding backwards into the barrier.

Ricciardo, who finished eighth, limped back to the pits.

Red Bull driver Alex Albon ended the running in fifth place, one second off the pace. British teenager Lando Norris finished 16th, 2.4 seconds off Leclerc's pace.

Home favourite Daniil Kvyat broke down on track after an apparent fuel issue in his Toro Rosso.