Lewis Hamilton topped the timesheets in the second practice session on Friday ahead of the 2018 Formula One Russian Grand Prix, after Sebastian Vettel had gone quickest in the morning.
The Mercedes driver set a time of one minute, 33.385 seconds on hypersoft tyres at the Sochi Autodrom, while team-mate Valtteri Bottas and Red Bull's Max Verstappen were close behind.
Hamilton had come third in FP1 behind Vettel and Verstappen despite running on ultrasofts.
Here's the classification from FP2:
Donning hypersoft tyres, it took Verstappen just 13 minutes to go quicker than Vettel's timesheet-topping lap from FP1.
The Red Bull remained atop the pile until Mercedes duo Hamilton and Bottas—the defending champion in Russia—made their switch to the compound.
The results were immediate, as the Finn claimed P1 with his first run before immediately making way for his team-mate:
Meanwhile, Charles Leclerc, who spent much of the morning session wrestling with his Sauber, continued to struggle and was thankful for a substantial run-off area when he missed Turn 5.
Hamilton's position atop the timesheet was more or less assured in the later stages of the session as teams switched their attention to longer runs, but Sergio Perez will have been happy to claim seventh spot behind the Mercedes, Red Bulls and Ferraris.
Here's the classification from the first free practice session:
McLaren's Stoffel Vandoorne set the first benchmark on soft tyres, but he was quickly knocked off the top by the likes of Ferrari's Kimi Raikkonen and Red Bull's Daniel Ricciardo.
Hamilton briefly held the quickest time courtesy of his ultrasoft tyres, but Verstappen's hypersoft compound allowed him to go even quicker.
Meanwhile, McLaren reserve driver Lando Norris found himself going in the wrong direction after he clipped a kerb and spun at Turn 4:
He wasn't the only one to run into some difficulty. Hamilton also found himself running off the track at Turn 2, while Lance Stroll spun at Turn 8 after he lost control of his Williams:
As Mercedes switched their attention to long-run pace on harder compounds, Vettel stole in to leapfrog them and Verstappen on the timesheets.