Sebastian Vettel still chasing more wins despite big championship lead

That is the view of his team boss Christian Horner, who reckons that Vettel is not yet ready to start taking things conservatively to guarantee another crown.

The German's triumph in the European Grand Prix, which was his sixth victory this season from eight races, means he now has a 77-point advantage over Jenson Button in the championship standings.

Horner said that such a margin would not distract Vettel from his desire to keep adding more race victories to his tally.

"He is very focused on winning," said Horner. "Montreal was all about winning. He went for it on the last lap because he knew he had to stay ahead at the DRS zone, but it did not work out for him there. His mindset is 25 points."

Vettel's advantage at the top of the standings means he could miss every race up until the Belgian Grand Prix at the end of August and still be leading the title chase at the Spa-Francorchamps event.

And although many of Vettel's rivals now concede the title fight is all but over, Horner still refuses to believe Red Bull Racing has got the championship in the bag.

"I don't know how many points there are available," he said. "There are a lot of points on the board available and up for grabs, so you can never say never.

"Our focus is race-by-race: to go and maximise our performance and get the best out of each weekend we can. This weekend we came within three points of a maximum score, and we have had both cars on the podium."

He added: "He [Vettel] and the team have got themselves into a strong position but, as we know, there is such a long way to go in this championship, and who knows what the effect of the regulation clarification - it is not a change - could be for Silverstone.

"I feel we have capitalised on all our opportunities so far and, as a team, that is hugely rewarding."