The layout of Baku City Circuit presents some real problems in trying to protect a lead at a restart - and the best methodology had prompted much pre-race discussion.
"We've been privileged many times to be on pole with a fast car, so in 2016 / 17 we spent hours reviewing how best to restart things in Baku and there's no one good way of doing it" said James Vowles, Chief Strategist.
"You can go the Vettel way and leave it late, which is what they did in F2 as well - but that is high risk and often ends up with another Safety Car period ensuing straight afterwards. You normally end up with cars three-wide behind you because it's not a short enough run into Turn 1 and you don't get enough disparity between the cars. It can end up with another shunt, so we erred away from that.
"The best option is what Lewis did in 2017, when you back way off and let the Safety Car get way ahead and then push out of the exit of 16, because it's just not possible to get to you there if you do it in the right way.
"But the problem here - and it's only particular to Baku - is that the Safety Car basically lets you go at the sector two line, which is the entry down into the hill. That's nowhere near enough time for it to get all the way around into the pit lane again - and that's why last year you saw Lewis slowing all the way down. It makes it very difficult to do, especially when the tyres are cold."
Lewis, this year, was not happy with the restart tactics employed by Vettel after an opening lap Safety Car.
"The rules say you can't gas it and then slow down, which he did three or four times. Obviously, if you are allowed to do that, everyone would, so we need to speak to Charlie (Whiting, F1's Race Director) because it sets a precedent, not just for F1 but all other formulae too."