Marussia is still investigating the cause of Timo Glock's accident in practice to work out if his front wing failed before he went off the track.
Television footage of the incident at Turn 1 in second practice showed the front wing was off his car before he hit the barriers - but neither the team nor driver are sure if the wing came off after he had gone off the track.
The team was still looking into the data on Friday evening to try and work out what happened, while Glock said he was unsure about the case.
"I just know that the car went straight," he said when asked by AUTOSPORT about the incident. "When the front wing dropped off I have no idea. I didn't see any video footage so far, so we are looking into it.
"We have a bit of a direction and we just have to wait until we have the whole analysing done and see what the problem was."
Although Glock said over the team radio that he had hurt his hand in the crash, he made it clear that the matter was not serious.
"In the first moment it felt like I had hurt it. I was so slow in the end [of the crash], and I thought I would just touch the tire barrier, so I kept my hands on the steering wheel," he explained.
"I didn't have much speed, but it felt like I ran against a wall and not a tire barrier. We pulled 8G, and I got a bit of a hit on my hand. But it is all okay now."