Germany's Sebastian Vettel has become Formula One's youngest quadruple world champion after winning the Indian Grand Prix on Monday.
His Red Bull team also took out the constructors' championship for the fourth year in a row.
The victory from pole position was the 26-year-old's sixth in a row and completed a hat-trick of wins in India where no other driver has ever won since the race made its debut in 2011.
Vettel becames the fourth quadruple champion and only the third driver to win four titles in a row after Germany's seven-times champion Michael Schumacher and the late Argentine Juan Manuel Fangio.
Pole-sitter Vettel pitted early to change his soft tyres but then roared through the field to win 30 seconds ahead of Mercedes's Nico Rosberg, with Lotus driver Romain Grosjean third.
Vettel was reprimanded after his win by stewards for ignoring post-race procedures and performing crowd-pleasing 'doughnuts', with the car spinning in a circle of tyre smoke at the end of the pit straight.