Felipe Massa is on the back foot ahead of qualifying for the Chinese Grand Prix after a problem with the rear-wing on his Williams caused a crash that would rule him out of the majority of FP2.

The Brazilian lost the Williams under braking for the hairpin at the end of the back straight, the rear snapping from him and pitching him into the wall.

Though the ensuing impact was relatively minor, it was enough to consign Massa to the pit lane for the remainder of FP2, leaving him without the team's latest front wing and putting him under pressure ahead of qualifying.

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"During braking I had a problem on the rear wing and the downforce didn't come back, so I had no grip on the rear and that's why I spun," he said. "Unfortunately I lost the second session because of that.

"After that problem they changed the rear wing for Valtteri [Bottas], and he never had that problem, which is positive for him but not for me because I lost a session. I lost the front wing, which was new and the only one we have, so it's a real shame what's happened."

Looking ahead, Massa is sceptical as to whether Williams can challenge Ferrari in qualifying, but is not ruling himself out.

"We need to wait and see because Kimi was more competitive They were very strong on the long run so we need to understand how much fuel they had. It means we need to prepare everything we can for the qualifying, and especially for the race."