What happened: Hamilton overrode a virtual-safety-car pit call and extended a soft-tire stint to the flag at Marina Bay. He fell from third on the grid to sixth, while teammate Leclerc finished second on fresher rubber.

Why it matters: The call cost Ferrari points with both cars in podium range at the start. Leclerc's pace on the alternate strategy underlined the position lost on Hamilton's side of the garage.

What to watch: Watch Ferrari's debrief and how pit-wall authority is handled at the next round.