Charles Leclerc has told himself to "shut up" and show restraint in difficult situations after venting his frustrations during the Singapore Grand Prix over his in-car radio.
Leclerc was annoyed after seeing teammate Sebastian Vettel put onto what turned out to be the better strategy. Leclerc had claimed pole and led the early stages of the race, but emerged from his stop behind Vettel -- the Ferrari drivers would finish in that order for its first one-two of the season.
He made his feelings clear over the car-to-pit radio during the second half of the race.