Valtteri Bottas regrets sticking with the aerodynamic upgrade Mercedes brought for the Malaysian Grand Prix, after qualifying almost seven tenths slower than Formula 1 team-mate Lewis Hamilton at Sepang.
Hamilton decided to ditch the new package - which includes a wider 'nose cape' just behind the front wing - ahead of today's sessions, while Bottas opted to try to make it work having outpaced Hamilton while using it in FP3.
While Hamilton took pole position with a lap of 1m30.076s, Bottas could only manage a Q3 best of 1m30.758s, leaving him fifth on the grid.
"It's easy to say afterwards, but if I could do the qualifying again I'd go for the other package," said Bottas to TV crews after qualifying.
"We need to review everything. We need to see what are the actual differences. The gap in Q3 was huge.
"We will look into everything to fully understand what's going on with the car because it's so much work sometimes to get it right, and sometimes we get it working and sometimes not. I didn't get it today."
When asked if he thought Mercedes may need to use him to cover Sebastian Vettel's expected charge from the rear of the grid on Sunday, Bottas claimed he was more focused on what will be going on ahead of him.
"Hopefully we have enough pace that we can focus ahead, and try to beat both of the Ferraris rather than just one," he said.