SEOUL – Formula One championship leader Sebastian Vettel is cautious about the prospects of Red Bull continuing its dominance at this weekend’s Korean Grand Prix, saying the layout of the circuit does not suit the car’s strengths.

Vettel leads Ferrari’s Fernando Alonso in the drivers’ championship by 60 points with six races remaining, and the dominant nature of the German’s victories in the past three races suggests the remainder of the season will be little more than an extended coronation.

Vettel was in a different league at the last race in Singapore, with the twisty confines of Marina Bay playing to Red Bull’s strengths.

And that came after he demonstrated that the team’s supposed vulnerabilities on the fast and flowing tracks was overstated, given his comfortable wins in Belgium and Italy.

The Yeongam circuit in South Korea combines both elements, and this is what has Vettel a touch concerned.

“I love the curvy part because it’s a lot more fun, whereas the straight lines and sharp turns can be a little boring,” Vettel said. “They are also our weakness, because (we) often lack in top speed there.”