Daniel Ricciardo beat Red Bull team-mate Max Verstappen by just 0.026s to steal pole position during a thrilling conclusion to qualifying for Formula 1’s Mexican Grand Prix.
Verstappen, having led the way through practice, headed the pack after the first runs in Q3 at the Autodromo Hermanos Rodriguez, while Ricciardo held fourth.
But on the final efforts Ricciardo beat his team-mate’s benchmark by just 0.026s to snatch top spot, while Verstappen failed to improve.
It rewarded Ricciardo with his third career pole position, and the first time he has led a qualifying session outside of Monaco.
“I’m tripping major nutsack right now,” quipped an elated Ricciardo after climbing from his RB14.
Verstappen’s original benchmark was still sufficient for second spot and it marked Red Bull’s first front-row lockout since its dominant period in late 2013.
Verstappen cut a downbeat figure as he called his whole qualifying session “crap” amid complaints over engine braking and rear locking.
World Champion elect Lewis Hamilton was third, 0.135s behind Ricciardo, while sole title rival Sebastian Vettel will line up alongside in fourth position, having finished just 0.211s down on his former team-mate.
Valtteri Bottas and Kimi Raikkonen took fifth and sixth respectively, behind their title-contending team-mates.
All six of the front-runners will start the race on the purple-ringed Ultrasoft tyre after successfully negotiating Q2 on that compound.
Renault and Sauber filled out the remaining Q3 positions, as Nico Hulkenberg comfortably led the way in the midfield battle.
He was followed by Renault team-mate Carlos Sainz Jr., while Charles Leclerc maintained a gap over Sauber stablemate Marcus Ericsson.
Force India trialled Supersofts and Ultrasofts in Q2 and used the purple-banded tyre in a bid to make Q3, but Esteban Ocon and Sergio Perez were left 11th and 13th respectively.
Fernando Alonso secured an encouraging 12th for McLaren, with Brendon Hartley the slowest of the 14 Q2 runners, having made a mistake into Turn 12 on his final push lap.
Pierre Gasly, facing a back-of-the-grid start due to engine and gearbox changes, made it through to the second segment but did not post a timed lap.
Romain Grosjean missed out on a spot in Q2 by less than 0.050s and will drop three places as a result of his penalty for colliding with Leclerc in Austin.
Stoffel Vandoorne suffered his 12th straight Q1 elimination, falling just a tenth shy of making it through, while Kevin Magnussen compounded a difficult day for Haas.
Magnussen, having sat out most of FP3 due to an intercooler problem, was only 18th, some way adrift of team-mate Grosjean.
Williams finished at the rear of the field, with Lance Stroll – who went wide at Turn 8 on his final Q1 effort – ahead of team-mate Sergey Sirotkin.
Sunday’s 71-lap Mexican Grand Prix is scheduled for 13:10 local time
