Lewis Hamilton reckons his qualifying performance in Portimao was one he would put towards the bottom of his all-time one lap performances.
The Mercedes driver still managed to take second place and was beaten by the tiniest of margins despite his scrappy run.
"There was honestly so much time available and I just didn't put it together," Hamilton told Sky Sports. "This qualifying session goes kind of at the bottom of my qualifying sessions over time.
"It was really tricky conditions here with the surface of the track and not a lot of grip, and the tyres, you need extra laps to get the temperature into them. One minute you have grip, the next minute you don't and so it's tricky for everyone."
Hamilton leads the championship by one point over Max Verstappen and believes Sunday's race will be a close affair between himself, Verstappen and Bottas.
"It's gonna probably be a close battle between the three of us," added Hamilton. "I'll try to get as close to Valtteri as I can off the start and go from there."