Six-time world champion Lewis Hamilton took pole position ahead of the first Portuguese Grand Prix in 24 years, with Mercedes teammate Valtteri Bottas completing another front-row lockout.
The pole made it 12 out of 12 for the champions this season and was a record-extending 97th of Hamilton’s Formula One career.
Australian driver Daniel Ricciardo could only qualify in 10th place for Sunday’s race after an eventful session which saw him spin his Renault off the track.
It had all been a bitter blow for Bottas, 69 points behind Hamilton in the championship, after the Finn had been quickest in every practice session, as well as the first two stages of qualifying.
Hamilton’s ninth pole of the year leaves him perfectly placed to win an all-time record 92nd victory on Sunday at the Algarve circuit near Portimao.
“I can’t tell you how hard that was today. Yes, we’ve got a great car but you have to drive the nuts off it to pull out a lap,” said the Briton, who seized pole with his last of three flying laps.
“Valtteri’s been so quick this weekend, you’ve seen he’s topped every session. So I’ve just been digging and digging and digging and trying to find that extra time.”
Red Bull’s Max Verstappen qualified third, with Charles Leclerc fourth for Ferrari in a boost for the Italian team after recent struggles.
At the end of Q2, Ricciardo lost control of his Renault and went off into the gravel. With the car’s rear wing damaged, the Australian driver was unable to take part in Q3, so had to settle for 10th place.
Leclerc’s team mate and four-time champion Sebastian Vettel managed only 15th, a place behind the Williams of George Russell.