Sebastian Vettel's time for celebrating his second F1 title is already at an end with the German turning his focus back to the job at hand ahead of this weekend's Korean Grand Prix.

The Red Bull man wrapped up the title with a podium finish at Suzuka but has had little time to celebrate becoming the youngest double champion in the history of the sport with the Japanese and Korean events running back-to-back.

Vettel now heads to Korea eager to avoid a repeat of the retirement he suffered last season when he ran into engine problems but he admitted that the race would be one of the more demanding left on the calendar this season.

"It's been a great few days - but now I am fully focused on the next race in Korea," he said. "The circuit is very demanding and quite tight, especially at the pit lane entry. You actually drive almost blind along the wall and, if the car in front of you drives into the pit, you have to quickly get out of the way.

"The track is pretty slippery at the start and gets better by the end of practice. The track in Korea is effectively made up of three parts. The first reminds me of Turkey; the second stretch has long straights like Monza and the third has tight corners like a town track. It is as if they have taken corners from Monte Carlo or Istanbul.

"It's important to find a rhythm. I find corner eleven, which has two apexes, the most interesting."