News in depth
An investigation is taking place over a physical altercation between two Porsche Carrera Cup drivers in the Gold Coast paddock today.
The Supercars title contenders will start the first leg of the Gold Coast 600 from opposite ends of the Top 10, with Scott McLaughlin on pole and Shane van Gisbergen on the fifth row after a kerb strike in the Shootout.
Ducati rider Andrea Dovizioso returned to the top of the timesheets in third practice for MotoGP's Japanese Grand Prix, narrowly edging Cal Crutchlow and Johann Zarco.
Shane van Gisbergen has secured provisional pole for Saturday's leg of the Gold Coast 600, while Craig Lowndes will start outside the Top 20 thanks to a penalty for running into Richie Stanaway
Sebastian Vettel thinks the way that Formula 1's red flag rules are policed is wrong, after being handed a three-place grid penalty for not slowing enough in practice for the United States Grand Prix.
Ryan Blaney led Friday's NASCAR Cup practice from Kansas Speedway for Team Penske.