Heavy rain has forced INDYCAR to suspend the Grand Prix of Alabama until noon ET Monday due to treacherous track conditions.
DJR Team Penske's Scott McLaughln has completed a sweep of the Phillip Island 500, to extend his lead in the 2018 Supercars Championship.
Sebastian Vettel has won back-to-back races to kickstart the 2018 season following a botched pit stop that saw Kimi Räikkönen drive over one of his mechanics.
Renault development driver Artem Markelov has taken victory in the first Sprint Race of the 2018 Formula 2 Championship.
Craig Lowndes has broken a winless streak spanning almost two years to record his 106th career victory in the second leg of the Tasmania SuperSprint.
Reigning IndyCar Series champion Josef Newgarden has won the 2018 Pheonix Grand Prix after a late charge home from fourth in the last seven laps.
Carlin's Lando Norris has taken his first Formula 2 race victory in the season-opening feature race around the Bahrain International Circuit.
Jamie Whincup has taken his second victory of the 2018 Supercars Championship in the opening race of the Tasmania SuperSprint.
Grant and Iain Sherrin have recovered from a late race drive through penalty to win the 2018 Bathurst 6 Hour.
Live updates from Sunday at the 2018 Bathurst 6 Hours.