Sebastian Vettel says that winning his third F1 title is just unbelievable, with the German doing what was needed in Brazil yesterday to take out the honours.

Vettel looked at times to have missed out on securing the title as he slipped back yesterday, and race damage also threatened his ambitions, but in the end the Red Bull man was able to get the points required to win top honours for the third year running.

And the 25 year old says he is still waiting for the victory to sink in, as Fernando Alonso came and congratulated him.

" Obviously it will take time [to sink in]," he told Sky Sports. "Unbelievable I think.

"Very difficult to find the right words. A very, very tough season. On track, off track, I think for me it was the toughest one but obviously we tried to be strong, fight and be in there and we always bounced back.

"Today they tried to throw everything at us but we never gave up and I'm very proud of that. It was an incredibly difficult race but to come out of it and win the championship here is unbelievable."

Now Vettel can go into celebration mode, he says that after the Brazilian GP, he will definitely take some time out to enjoy his achievement.

"I'm sure the lads will have something organised. I'm looking forward to that, but I think it will take time to sink in properly what happened today," he explained. "I think it was probably the most difficult race we faced. In terms of timing, our stop wasn't great to fit the dry tyres one lap before the rain came. But I think there's so many examples: the radio didn't work, we got spun round on the first lap. We were dead last..."

Sebastian Vettel
Sebastian Vettel now has three titles to his name.

Meanwhile, Alonso insisted that even though the title race is now over, and once more he will come out second best to Vettel, he couldn't have asked for a better season with Ferrari.

The Spaniard said: "First of all, I'm very proud of my team and very proud of the season we did.

"I score this season a ten. If we had to repeat these twenty races I would change nothing done by the team or yours truly: no mistakes, no mechanical problems, zero problems at the pit stops, zero strategic mistakes.

"I don't think we lost the championship here in Brazil but in some of the races where we were a little bit unlucky.

"We might not have finished the season with the most points, but we won many other things, like everyone's respect and fans and colleagues agree on who was the best this year.

"But when you do something with all your heart and 100% then you have to be proud.

"We proved that even with a car that was a little bit slower than the others we can win the championship. With a car that was the same as the others then I think we can win a few races before the end. It's been a good season for us."