With a headwind it seems pretty basic to leave it as late as possible. Although the MS team didn’t do Ewan any favours by only having 1 rider left with him for most of the last lap. Comments where calling Bauer and Hayman as being last 2 with him, although I expect it might have been Impey not Hayman, but as Yaco suggests not really enough lead out fire power there.
Greipel also hit Ewan very hard with a shoulder bump when they just started to sprint in the straight which knocked Ewan off the wheel he was following towards the barrier. Ewan sprints with a big gear so it would take a lot of energy to build up to his max speed again (on a slight rise and without cover into headwind). Not a surprise he died towards the line.
Sagan was the rider who had the biggest shadow (Greipel) into headwind/rise for longest so he won - smartest beats fastest. Interesting that the Bora team was all lined up riding for Sam Bennett on one side of track, while Sags was surfing wheels for himself on the other side waiting for Lotto and the Gorilla to turn up.