THAILAND - Honda's Marc Marquez sealed his sixth MotoGP title, and eighth overall, with four races to spare after winning the Thai Grand Prix on Sunday.
The Spaniard pipped pole sitter Fabio Quartararo at the final corner before the line after a long on-track battle. Monster Yamaha's Maverick Vinales finished in third.
Marquez, 26, had to score two points more than Italian Ducati rival Andrea Dovizioso, who finished fourth at Buriram's Chang International Circuit, to wrap up his fourth championship in a row.
In Marquez' grand prix career, he was 125cc (now Moto3) world champion in 2010 and Moto2 winner in 2012.