Sebastian Vettel clocked a blistering record lap time in the shortened last practice session at the Indian Grand Prix on Saturday to underline his determination to wrap up the world title this weekend.
Vettel, who only needs to finish among the top five on Sunday to seal his fourth consecutive Formula One crown, timed 1min 25.332sec to go quickest in the session.
The 26-year-old German, also fastest in both practice sessions on Friday, is set to match compatriot Michael Schumacher and Juan Manuel Fangio of Argentina as the only drivers to win four successive titles.
Team-mate Mark Webber made it a one-two for Red Bull at 1:25.892, while Ferrari's Fernando Alonso, the closest challenger to Vettel but a mammoth 90 points behind in the standings, came in third at 1:26.105.
The session was reduced to 40 minutes instead of an hour after poor visibility caused by mist and haze delayed the start.
Vettel, who has won the last five races, romped home in India in 2011 and 2012 and looks unbeatable again.
The only way Vettel can be denied another world title is if he fails to score a point in the remaining four races -- provided Alonso wins at least three of them and finishes second in the other.