Sebastian Vettel has urged Red Bull Racing not to be complacent after their triumphs this year.

German Vettel won the Drivers' Championship last season while Red Bull took the Constructors' crown, with the 23-year-old crediting his team's "belief".

Vettel and Mark Webber's one-two in Brazil secured the former the title and the team the Constructors' title ahead of McLaren, but Vettel is taking nothing for granted in 2011.

He told Autosport: "The most important thing is not to stop working now, or thinking that can we do it like this year. We have to progress, we have to get better and we have to get stronger.

"We have to look for details and search for every single opportunity to be better than we were this year.

"Everyone else is trying to move forward and if you just stay where you are, then they will end up in front of you."

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