Lewis Hamilton took the honours in final practice ahead of the Belgian Grand Prix as Ferrari suffered yet more embarrassment.
A rain shower with 20 minutes of the hour remaining at Spa-Francorchamps led to all cars diving back into the garage while it passed, leading to a busy closing eight minutes on the low-fuel, soft tyre qualifying mode runs.
At one stage there was a line of cars queueing up into the Bus Stop Chicane waiting to begin their flying lap, leading to Williams' George Russell proclaiming it "a joke" and Red Bull's Max Verstappen stating "that's some traffic jam".
Come the conclusion, six-time F1 champion Hamilton found himself out in front in his Mercedes with a lap of one minute 43.255secs, finishing 0.230s ahead of Renault's Esteban Ocon, with McLaren's Lando Norris third, 0.386s adrift.
It was clear the traffic issues caused problems and those out in front managed to get in a clear lap, while others were compromised.
The situation at the close was underlined by the fact Ocon was quickest in the first sector, and AlphaTauri's Daniil Kvyat the best in the final sector. The Russian was 12th.
Overall, the Ferrari-powered cars occupied six of the final seven times, led by Kevin Magnussen in his Haas despite the fact he did not take part in the last few minutes with his car again up and being checked over in the garage.
The Dane, like team-mate Romain Grosjean, only managed 12 laps across Friday after missing FP1 and the first hour of FP2 following an engine change.
There is every possibility a works Ferrari could fail to make it out of Q1.
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