• Belgian Grand Prix - FP2

Vettel in dark over tyre failure

Sebastian Vettel was quickest but missed the last 20 minutes after his tyre failure © Associated Press

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Sebastian Vettel admits he doesn't understand what might have caused his tyre failure during second practice for the Belgian Grand Prix.

It was an encouraging day for Vettel as he and Mark Webber were comfortably fastest, but his FP2 running was ended prematurely by a tyre problem as he exited Courbe Paul Frere towards the end of the lap. After the end of the session, Vettel admitted he still didn't know what had caused the issue and that it had caught him by surprise.

"We don't know what happened yet," Vettel said. "So basically I lost the rear right very suddenly, so we need to have a look. At the moment we don't understand; Pirelli I think are trying to find out what exactly happened and then other than that I think it was a positive day.

Asked if he had noticed a point where he could have picked up a puncture by hitting a kerb hard, Vettel replied: "No, I wasn't doing more or less than I was doing ten laps before."

With Vettel going for a low-downforce set-up and Webber more high-downforce, Vettel said the final lap times had left Red Bull in a strong position.

"In the end you can see there's not much difference in the two set-up directions. We just tried to find a little bit of a direction, I think it's good that we collected some data - now we have the possibility to compare - and then we'll have to see what's happening and have a look at the weather forecast etc. Nothing is decided yet but it's good to have a bit more knowledge on Friday afternoon than questions."

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