SINGAPORE — George Russell in a Mercedes topped the timesheets yesterday in the only practice session for the Singapore Grand Prix at a Marina Bay Circuit enveloped in smoky haze caused by fires in Indonesia.

Charles Leclerc’s Ferrari was second on a dusty surface with the McLaren of Lando Norris third as drivers and teams had just one hour-long session to maximise their set-ups before sprint qualifying yesterday.

Singapore is featuring a sprint race for the first time and the only practice session took place before sunset, not ideal preparation for the Marina Bay Circuit’s night race tomorrow.

Russell will start from the back of the grid for tomorrow’s race after taking a penalty for using too many engine components, but he can still compete for pole position in today’s sprint race.

The Englishman went round in 1min 32.274sec, 0.198sec ahead of Leclerc as the top five times were all set on the soft compound tyre, with Ferrari’s Lewis Hamilton fourth and the second McLaren of Oscar Piastri fifth.

Max Verstappen, who won for the first time this season in Malaysia last weekend, was the fastest of the medium-compound runners in sixth, 0.732sec slower than Russell but half a second ahead of the other Mercedes of championship leader Kimi Antonelli.

Isack Hadjar of Red Bull was seventh fastest, followed by Pierre Gasly of Alpine and Liam Lawson in an RB who rounded out the top 10.

Verstappen has never won in Singapore, where extremes of heat and humidity play a part in the most physically attritional race of the season on a circuit notoriously difficult for overtaking.

Drivers can shed up to 3kg (6lb) during the race from sweating alone and the race has been declared a “heat hazard” by organisers.

That means drivers can opt to wear cooling vests because the heat index is predicted to exceed 31C during either the sprint or the race.