Romain Grosjean admits he was responsible for the Practice Two shunt that cost him his front wing in Hungary.
Pushing hard before the forecast rain arrived, the 26-year-old ran wide at the exit of the chicane, putting his Lotus E20 into a spin.
The momentum took him across the track and into the inside barrier, which he hit front of his car.
Grosjean, though, was able to make his way back to the pits and rejoined the action shortly after.
"Not the best day we've had but not the worst either," said the Frenchman.
"The car didn't feel quite as I like it, similar to how it felt in Hockenheim, which made things a bit tricky.
"I made a mistake running wide on the exit of Turn Seven in the second session which meant I touched the wall, so a big apology to the guys for that.
"On a more positive note we now understand a few things which need improving in terms of setup, so hopefully tomorrow these will make a difference and I'll have the confidence to push a bit harder and show the true pace of the car."
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