After Joan Mir’s podium at Motegi on Sunday, team-mate Luca Marini took over the HRC limelight by leading opening practice for the Indonesian MotoGP. The Italian switched to new medium tyres to vault to the top by 0.136s over KTM’s Pedro Acosta (new front tyre, old rear) on his final lap. The Spaniard’s pace on 22-lap old tyres led to suggestions the on-screen tyre data might have been incorrect but was later confirmed as true by the official classification. Pramac Yamaha’s Jack Miller fitted new tyres for a late sixth place, with Rins’ team-mate Fabio Quartararo staying on old rubber for seventh. Riders usually selected ‘unwanted’ compounds for FP1 to avoid using up their favoured tyres on a dirty track.