Red Bull pair Sebastian Vettel and Mark Webber admitted there was some concern at not being able to try the dry Pirelli tyres during Friday practice in Korea.

Wet conditions in both sessions meant teams were only able to put meaningful mileage on the wet and intermediate rubber, although some drivers did venture out on slick tyres for an exploratory lap right at the end of FP2.

Vettel ended the afternoon with the third quickest time, albeit more than 1.8secs down on the benchmark time set by the McLaren of Lewis Hamilton.

Like his rival, Vettel said it was hard to read too much into the Friday results but admitted it wasn't ideal to have had no dry running ahead of a race where tyre wear is expected to be a big factor.

"It was an interesting day," he said. "For Saturday and Sunday the weather forecast is dry, so whatever we learned today might not be worth a lot this weekend, although we can use it for future races when it's damp or wet.

"Unfortunately the track didn't dry out at all today, so we didn't get a chance to try the slick tyres, so we'll find out in the race I guess. It's a tough track for tyres here, even though you have a long straight, there's hardly any rest after that, so it's not easy. The car feels okay though and that's important."

Team-mate Mark Webber, who ended the day fifth fastest and admitted that there was plenty of work to do on Saturday to allow teams to get used to the dry tyres - if conditions allow.

"It was pretty straightforward for everyone today - we drove on one set of tyres, so it wasn't particularly exciting. We did some work, but it was limited knowing that the rest of the weekend will probably be dry, but we'll see. McLaren looked very strong in the intermediate conditions and we didn't get a chance to use the slicks at the end.

"The track takes a long time to dry out here. The slick tyre is the biggest thing - we need to learn how they are going to behave for us on the different fuel loads, we'd normally do that today but we'll have to move that to tomorrow morning."


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