Christian Horner says he is keen to see Red Bull wrap up the F1 championship titles as soon as possible after Sebastian Vettel extended his advantage in Singapore.

The German took his third successive victory to go 60 points clear of Fernando Alonso in the drivers' championship while Red Bull continue to lead the way in the constructors' standings.

Vettel is now firmly odds-on to become a four-time champion this season, but Horner said the team wasn't taking anything for granted with six races still to run.

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"You can't become complacent in any way; we never have yet and we won't certainly this year," Horner was quoted by ESPN. "Our approach is one race at a time, the next challenge is Korea - to get the most out of that venue - and then after that obviously Suzuka. If we keep doing that then the championship tables tend to take care of themselves.

"We've had two bloody close ones that I don't want to go through again. Brazil last year I've now got several grey hairs from, Abu Dhabi two years' earlier was about as stressful as you could get. The most important thing is winning. We're trying to defend both titles and our job is to try to do that as soon as possible. It's not our responsibility to take it to the last race, which hopefully it won't go to."

Horner added that wrapping up the title quickly had taken on adding importance because of the change in regulations that will come into force next year, with Red Bull set to face an increased challenge from its rivals next year

"Next year's a bit of a game changer and I think the power units are going to become a really key performance differentiator and whoever out of Ferrari, Mercedes and Renault gets it right or wrong on the power unit side could have a big effect on the pecking order and performance," he said. "Of course, nobody knows at the moment; everybody thinks they're doing alright but until we turn up in Melbourne it's going to take the first half of the year to see things settle down."