Jenson Button says he is baffled as to why he could not match team-mate Lewis Hamilton's pace in qualifying for the Abu Dhabi GP.
While Hamilton put his MP2-27 up on pole position with a 1:40.630, Button could only manage sixth place, 0.660s slower than his compatriot.
The 32-year-old, though, says he has no idea why he was so woefully off the pace.
"It was not very good," he told the BBC.
"All weekend, the car has been very good. The pace has been there but in qualifying I had too much lap time.
"If I knew why, we would have sorted it out. We will look at it when I get back.
"Obviously the car is quick, Lewis is on pole by quite a bit.
"Most of the weekend, I've felt happy. I don't know where that has has gone. We just about got into Q3 as well."
Hamilton Beats The Bulls To Abu Dhabi Pole