Meanwhile, it took four races for teammate Hamilton to finally triumph - the longest start-of-season drought for a Mercedes driver since the introduction of turbo hybrid engines in 2014.
Mercedes, winners of three of the last four races in Barcelona, will be introducing major upgrades this weekend.
Fifth in Q1 and fourth in Q2, Hamilton delivered a 1:16.491s benchmark at the start of Q3 to grab provisional pole. Vettel admits that Ferrari could either end up on pole position or as far back as sixth place, which according to the four-time champion makes it more exciting even for the drivers.
"I mean, we are drivers, not to say that we know everything - we don't know anything about engineering the auto - but we know how the cars feel, how to drive the cars and their limitations to overtake", added the German.
"For us it was a flawless result today", he added.
"Today, the auto and myself, I felt that synergy today, which I hadn't been feeling for the whole year".
I don't get why great golfers design golf courses but I don't think any of the top racing drivers have ever designed a race track. "I hope everyone will enjoy it!"
Starting from pole position for only the second time this season, Hamilton eased away at the front once racing resumed after a first-lap incident triggered by Romain Grosjean. He and the team certainly look to have found the sweet spot in Barcelona.
Riders of the German team left behind pilots "Ferrari" and "Red bull".
Red Bull's Daniel Ricciardo was the biggest casualty in practice one after he lost control of his Red Bull at Turn 4, took a trip across the gravel, and thudded into the barriers.
Barcelona, with good memories for both, offers a chance to hit the reset button.
"Everything we bring to the track is delivering the expectations and the lap times we were expecting from them", Alonso said.
"It could be quite a defining moment for the season", Verstappen said.
Race lap record: 1:21.670, Kimi Raikkonen, 2008.
Stoffel Vandoorne finished 0.3s behind Alonso in Q2 and it proved to be a costly margin, preventing the Belgian from joining his teammate in the top-ten shootout. Those three were all in the last seven years, however.
Track layout aside, it is interesting to clarify the current state of the Miami Grand Prix. The return to form came at one of the most aero-sensitive circuits on the calendar, but also after Pirelli reduced the thickness of the tread by 0.4mm on its tyres to combat overheating.
"The plan for free practice one was no different to if Sergey had been in the auto", stated the team spokesperson.
- Douglas Emmett, Inc. (DEI), Physicians Realty Trust (DOC)
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