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Sebastian Vettel jets off to one of his favourite circuits in Japan knowing he can seal a fourth world title in succession, but he insists he is not popping the champagne corks just yet.
The Red Bull man led from pole to chequered flag at Sunday's Korean Grand Prix, meaning he will retain his crown if he wins again this week at Suzuka and Fernando Alonso is not in the top eight.
Vettel enjoyed another dominant victory in South Korea -- his fourth in as many races -- with Kimi Raikkon four seconds back in second place followed by Lotus team-mate Romain Grosjean.
