As you say, Ferrari pitted Vettel first to avoid a possible 1-4 afterwards. Verstappen had difficulties to defend from Bottas and the Ferrari strategists knew that Max was about to pit, so Vettel was told to pit in the last moment (last turn before pit entry). This way they defended an undercut from Max and at the same time wanted to do an undercut on Hamilton which obvoiusly worked as well. The plan was to pit Leclerc in the next lap and then come out with Leclerc 1 and Vettel 2, but the power of the undercut was underestimated by the team. Vettel gained 3.9 (!) seconds in his outlap and overtook Leclerc by a blink of an eye. He just needed to be about 0.3-04 seconds slower in his outlap or Leclerc 0.3-0.4 seconds faster in his inlap and this would have not happened.drunkf1fan wrote: ↑23 Sep 2019, 15:14It seems utterly simple to me.
Lead car getting the pit choice is a standard thing in F1 for every team, and every other team in every other motorsport, it's just the done thing. So if Leclerc pits and Verstappen does same lap, as said Ferrari probably get 1st and 4th, maybe worse.
So you can choose to bring in Vettel first instead to get a 1-2, but if you acknowledge that you are screwing Leclerc's priority choice by doing this, you can just as easily put Leclerc back ahead of Vettel. If Vettel knows that his options are being pit first and giving position back to Leclerc of being pit second and being 4th or worse... is that hard to sell to him, surely not?
Mercedes pit Bottas first, then protected Ham's lead over him (because it was easy to do so) because that is only fair. They could have pit Hamilton (who was asking for the undercut so clearly wanted to pit first) and Bottas could easily have lost out.
As for iotar saying it's 9-0, apparently he forgets that hamilton was pit immediately after Vettel to protect/block Vettel from getting ahead of Hamilton or closing on the pit window of Bottas who was leading. Exactly the same way merc often pit Bottas straight away and ahead of Hamilton in the lead in the same situation.
The one time I can remember Merc prioritising Hamilton over Bottas when Hamilton wasn't in the lead in the first place was Russia last season when the fight was still quite tight with Ferrari and Ferrari could have improved and won more in the remaining races (much as they won and improved in Singapore). Bottas also wasn't even close to a title fight last season at that point.
The only thing which Ferrari could have done better was informing Leclerc about Vettel's pit stop. Then maybe he could have been able to drive faster in his inlap.
As for the switch of Leclerc and Vettel, Binotto told that they considered it, but then ditched the idea because they thought that Vettel would have been punished for something he was not to blame for.