David Coulthard says Vettel could become the best F1 driver ever as he continue to improve as a driver.

Coulthard: Well, I think we could well be witnessing the development of the best driver ever in Formula One. We can’t say yet, of course. Only history will judge that. But the fact that Seb continues to improve every aspect of his game, from race craft to tyre management, building on his natural speed, is indisputable.