Jenson Button cut a frustrated figure after qualifying in ninth place for the Monaco Grand Prix.
Button believed a higher position was possible but encountered a mechanical problem during his hot lap.
He lines up a row behind team-mate Sergio Perez.
“We had an issue with the car right at the end – I didn’t have any power, so I couldn’t post a quick lap,” he said.
“I’m ninth and that’s it. We’re our own worst enemy it seems. You eventually get the car working well and we’ve done everything right this weekend and then you have an issue like that in Q3.”
“Tomorrow’s race will be difficult, starting from P9, but on this occasion there’s absolutely nothing I could have done about it.”