Vitaly Petrov insists that anything is still possible despite a disappointing early exit from qualifying for the Belgian Grand Prix.

The Russian was hoping to benefit from the introduction of the F-duct this weekend to produce a strong showing in qualifying but instead lost the back-end of his Renault on his outlap and clattered into the barriers.

Not only did that put the GP2 graduate out of the session, but it also caused a delay which meant that rain arrived before his rivals had had chance to set a lap-time, which increased the drama as drivers battled to make it through to Q2.

Although Petrov will now start at the back of the field however, he remains optimistic of battling through the field on race day and is confident that the F-duct will help make up places.

"It was a very disappointing session for me today," he said. "On my out-lap on slick tyres, I went on the kerb at the exit of turn nine and lost control of the car because of the standing water. I wasn't able to get started again, so that was the end of my session. It was a big shame because the car has been very good this weekend, and I was aiming for a place in the top ten.

"But now this has happened, all I can do is focus on tomorrow and stay positive. The F-duct is working very well, so we are quick on the straights and will be able to overtake. Plus the weather forecast is uncertain, and we know that when it is wet, everything is possible."