Mercedes had dominated all three practice sessions and once again demonstrated their pace, securing their first front-row lockout of 2018. Vettel was right behind the silver cars, although Raikkonen was 0.439s off the pace, while Red Bull were pipped by Ferrari late on in Q3.
Kevin Magnussen took a superb sixth for Haas, ahead of local heroes Fernando Alonso in the McLaren and Carlos Sainz in the Renault. Romain Grosjean in the second Haas completed the top ten.
All the frontrunners progressed from Q2 on the soft tyre, meaning they will start Sunday's race on that more durable rubber, rather than the quicker supersoft compound.
Ferrari hadn't given much away in the three practice sessions but they began to show their true speed in Q1, with Vettel three-tenths quicker than Verstappen. Mercedes were unable to break into the top four in the opening phase, with Hamilton the quicker of the two Silver Arrows in fifth but 0.602s behind the pacesetter.
Haas have been in impressive form all weekend and both their cars made the top ten in the first phase, as did Spanish favourites Sainz and Alonso.
But Sainz’s team mate Nico Hulkenberg was the big faller in Q1. The German narrowly missed the cut after he only managed a single flying lap following an apparent fuel pressure issue on his Renault.
Also eliminated were Sauber’s Marcus Ericsson and Williams’ Sergey Sirotkin, the latter carrying a three-place grid penalty thanks to his collision with Sergio Perez in Baku.
Brendon Hartley did not take part after Toro Rosso could not fix his car in time following his heavy FP3 crash, and Lance Stroll was the final Q1 faller, the Canadian ending his day in the gravel after spinning at Turn 12 at the close of the session.
The first segment saw all the drivers end on supersoft rubber but, with an eye on the race, there was a switch of strategy when the action got back underway. Red Bull, Mercedes and Ferrari all opted to send their men back out on soft tyres.
And again, the Prancing Horse replicated their advantage with Vettel leading the way in Q2 and team mate Raikkonen two-tenths behind. This time the Mercedes duo were able to finish the session ahead of the Red Bull pair of Verstappen and Ricciardo, who were split by Kevin Magnussen in the Haas.
It was Bottas who led the way for the Silver Arrows – trailing the pacesetter by three-tenths – and he was joined in moving through to the final phase by the other Haas of Romain Grosjean, Sainz and Alonso.
But Q2 was a bad one for Force India, who lost Esteban Ocon and Perez in 13th and 15th respectively. McLaren’s Stoffel Vandoorne - who has been out-qualified by Alonso at the last eight races - Toro Rosso’s Pierre Gasly and Sauber’s Charles Leclerc were the others to miss out on the pole position shootout.
Hamilton was first to lay down the gauntlet in Q3, but it was Red Bull and not Ferrari who were the nearest challengers on the first run.
But that changed on the second with both Ferraris improving. Vettel was the quickest of the two, 0.132s behind the pole-sitter, while Verstappen out-qualified team mate Ricciardo for the third time this season.
So advantage Mercedes then. They locked out the front row on this track in 2014, 2015 and 2016 – and have done so again this year. But can they turn it into victory?
The key quote
“I needed this pole. I’ve not had pole for a while. It was very close, but I’m very happy. I was trying to go for it in every sector. It’s important for me to get back into a good position in qualifying, it’s usually a strength of mine. It was a very close qualifying. Ferrari looked to be sandbagging because they could.” - Lewis Hamilton
The key stats
- Mercedes secured their first front-row lockout of 2018. They also achieved the feat at this Barcelona track in 2014, 2015 and 2016
- Of the 27 Spanish Grands Prix to have taken place at the Circuit de Barcelona-Catalunya, 24 have been won from the front row
- Vettel has now gone 11 qualifying sessions in Barcelona without ever taking pole position
- The German did, however, out-qualify his team mate Raikkonen for the fourth time in a row
- Red Bull pair Verstappen and Ricciardo start fifth and sixth respectively, the same positions as last year
- Alonso put McLaren into Q3 for the first time this season – Spain was the first time he reached the final segment of qualifying last year too
- Sainz out-qualified team mate Hulkenberg for the first time since making his Renault debut in Austin, eight races ago
- Hulkenberg was eliminated in Q1 for the first time since the 2015 Spanish GP, ending his 59-race streak of reaching the second qualifying phase
- Leclerc has progressed to Q2 in consecutive races, the first Sauber driver to do so since Ericsson got his 2017 season off to a good start
- Both Williams were eliminated in Q1 for the third time in the last four races
Onboard pole lap
Sunday’s race begins at 1510 local time (1310 UTC) with the weather set to be cooler than last year – but the sun is expected to still make an appearance.