Giedo van der Garde says he is "fine" having suffered one of his "biggest" crashes to bring an early end to Wednesday's testing at Silverstone.
The Sauber test driver was behind the wheel of the C33 at the British track when, late in the day, he crashed at Copse Corner.
Losing the rear of the car, the Dutchman crashed heavily into the guardrail.
The damage to the barrier resulted in the session being red flagged while van der Garde was taken to the track's medical centre as a precautionary measure.
"This is really one of the biggest crashes I've had," he told Autosport.
"All the [G-sensor] lights went on on the car so I had to go to the medical...
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