Sebastian Vettel has admitted that Ferrari need to up their game in qualifying.

The Ferrari driver heads into the British Grand Prix weekend with a 20-point lead over Mercedes's Lewis Hamilton.

"It should be a good track for us," Vettel told German broadcaster RTL. "Silverstone is full of fast corners."

However, that does not mean he thinks Ferrari have nothing to work on for the future.

"I think we can improve a bit in qualifying," he said. "Mercedes seem to be able to pull out a bit more performance than us."

Ferrari trail leaders Mercedes by 33 points heading into the weekend's race.