Kimi Raikkonen is on pole position for the Monaco Grand Prix as Lewis Hamilton took only 14th at Formula 1’s biggest race.
The 37-year-old Finn is at the front of the grid for the first time in nine years – his last pole was the 2008 French Grand Prix.
Raikkonen edged out team-mate Sebastian Vettel by 0.043secs, with Mercedes’ Valtteri Bottas just 0.002secs further back.
Hamilton struggled with a lack of grip and faces a difficult afternoon on Sunday limiting the damage to his title hopes.
Jenson Button qualified ninth on his return to Formula 1 as a substitute for Fernando Alonso while the Spaniard races at the Indianapolis 500 this weekend.
Button ended up a place ahead of McLaren team-mate Stoffel Vandoorne, who was quicker than Button by 0.2secs and seventh in second qualifying only to crash at the end of the session.
But Button will start at the back of the grid because of a 15-place grid penalty for using too many engine parts.
What happened to Hamilton?
Hamilton was struggling with a lack of grip, had to abort two laps for almost-crashes, and then came across another crashed car on his final lap.
The Mercedes driver had been struggling since second practice on Thursday afternoon and, despite set-up changes for Saturday morning, he was still struggling going into qualifying.
He was 10th in the first session, 0.3secs off Bottas, but the second session began unravelling from the start.
On his first lap, a flick of oversteer at the fast Massenet corner at the top of the hills looked set to trigger a heavy crash, but Hamilton just kept the car out of the barriers, taking his hand off the wheel and shaking it afterwards as a reaction to how close he had come to an accident.
He complained to engineer Peter Bonnington: “I’ve got no grip, Bono. I’ve got to come in. Something is just not right with the car.”
When he went out again, things were no better. This time it was Casino that nearly caught him out, the car flicking into oversteer over the crest at the famous corner, Hamilton again just rescuing it from the barriers.
That left him with one last lap to try to get into the top 10 shoot-out, but as he was on it, Stoffel Vandoorne crashed his McLaren at the Swimming Pool, bringing out the yellow flags and meaning Hamilton could not improve.
Red Bull revival?
As Ferrari’s main title contender, Vettel will start a strong favourite for victory on Sunday, but Bottas is in the same place on the grid as he was when he won in Russia a month ago.
The Red Bulls had looked as if they might challenge at the front but dropped away as qualifying progressed and Max Verstappen had to be content with fourth, 0.3secs off pole and half a second ahead of team-mate Daniel Ricciardo.
Toro Rosso’s Carlos Sainz was an excellent fifth, ahead of Force India’s Sergio Perez, Haas’ Romain Grosjean and Button and Vandoorne.
Problems for Palmer
Jolyon Palmer had a difficult time struggling with understeer in the Renault and qualified 17th, nearly a second off team-mate Nico Hulkenberg in the first session as whispers grow that the Englishman’s seat is under threat.
More to follow