From Andrew Benson on BBC
At Red Bull, the dynamic is every bit as fascinating, as the increasingly impressive Daniel Ricciardo shows a clean pair of heels to his four-time world champion team-mate.
Vettel is making no attempt to hide it, saying he is being beaten "fair and square", and team boss Christian Horner admitted on Sunday that the German was "struggling, and it's difficult to explain why at the moment".
What to make of this?
There is no arguing with the scale of Vettel's statistical achievements in the last four seasons. But there was always a question about how much was driver and how much was car.
So are we now to think that what we watched was a very good, intelligent and consistent driver exploiting by far the fastest car, against a team-mate who was not able to adapt his driving style as effectively to its most powerful feature - exhaust-boosted rear downforce?
Or is Vettel truly the all-time great many believe him to be, and Ricciardo is potentially even better?