YEONGAM (South Korea): Reigning champion Sebastian Vettel heads into the last four races of the season knowing the momentum is with him, and his fate in his own hands, after a commanding win in South Korea.

The Red Bull driver secured a third win on the trot on Sunday and in doing so leapfrogged Ferraris Fernando Alonso at the top of the drivers standings, in what looks like a two-horse race now for the title.

The chasing McLarens of Lewis Hamilton and Jenson Button endured a dreadful weekend at Yeongam. Hamilton was 10th while his fellow Briton was dumped out of the race moments after the start by an apologetic Kamui Kobayashi.

Hamilton and Button, both former world champions, admitted afterwards that their assault on the crown was over. Kimi Raikkonen of Lotus is third in the championship but a hefty way behind the two at the top of the pack.

Vettel, who is going after a third title on the bounce, tops the charts with 215 points, the Spaniard Alonso is on 209 and Raikkonen back on 167. The next grand prix is in India in two weeks.

For many months it was something of a real roller-coaster ride, but we finally found our strength again and since Singapore it works, said the German Vettel, after he and Mark Webber took a Red Bull one-two in South Korea.

Today the team did everything right, and I didnt do anything stupid we sure want to keep it that way.

Singapore last month began a sequence of imperious victories for Vettel that saw him close the gap on Alonso, also a double world champion, before usurping him on Sunday. Alonso was third in the race, his team-mate Felipe Massa fourth.

But the 25-year-old Vettel said nobody at Red Bull was getting carried away.

What I think is important is that we have to keep things simple. That means that we have to concentrate on ourselves because we cannot influence what others are doing, and starting mind games now about what others will do in the next races is a waste of energy, he said.

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Vettel heads into last four races knowing fate is in his own hands