Where did the speed go? That was the question Sebastian Vettel and Ferrari would not, or could not, answer after a chastening, emphatic defeat in the Singapore Grand Prix at a track where it was expected to set the pace.
Until qualifying started, everything was going more or less to plan. Vettel had half a second in hand over Lewis Hamilton in free practice three, but from the moment Q1 started Ferrari was a step behind Mercedes and under serious pressure from the Red Bull of Max Verstappen.
The caveat was an incident that was superficially only a footnote to the weekend but that can't help but have contributed to what happened.