Sebastian Vettel has predicted it will be "quite tight" this weekend following practice on Friday for the Brazilian Grand Prix.

Vettel was slowed by "some issues" with his Red Bull, but reckons the pace should be "reasonable", providing "they get everything right". He finished FP1 down in 14th and was 9th in FP2.

"Overall it was okay today, some issues, but I don't think we have had too many Friday's that were trouble free this year," he told reporters in Interlagos. "All in all we didn't get that much running but that was mostly because of the red flags, which was the same for everyone. It is what it is.

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"We are still fighting and still trying to improve and find small things. There are a couple of things that we still need to work on."

"The grip seems fairly high on the new asphalt and it has made the track a lot smoother as well, with the exception of the main straight, which was the bumpiest bit in the past as well," he added

"It is debatable [if the tyre choice is right]. But obviously if we have rain on Sunday then we might not use the dry tyres too much."

So what are the prospects if it rains?

"It brings things usually a bit closer to us, but even in the dry if we get everything right we should be in a reasonable place," he continued.

"It is a short lap so it will be quite tight."