Six-times MotoGP champion Marc Marquez continued his perfect start with factory Ducati as he completed a weekend double at the season-opening Thailand Grand Prix on Sunday, finishing ahead of his younger brother Alex.

Six-time world champion Marc Marquez won the season-opening Thai MotoGP on Sunday to complete a dominant debut weekend at his new factory Ducati team, having also romped to Saturday's sprint. The start of the new MotoGP season has been overshadowed by the absence of world champion Jorge Martin.

Marc Marquez marked his Ducati debut with an impressive victory on Sunday at the Chang International Circuit in Thailand becoming the first rider since Casey Stoner in 2007 to win on their Ducati debut.