The world champion went on the attack with Michal Kwiatkowski (Team Sky) and Sep Vanmarcke (LottoNL-Jumbo), dropping the former on the Oude Kwaremont and the latter on the Paterberg. As Fabian Cancellara (Trek-Segafredo) gave chase behind in his final Ronde van Vlaanderen, Sagan folded his arms over his handlebars and soloed to take a famous win.
It was a fast and furious day of racing in the Flemish Ardennes and the hopes of pre-race favourites Greg Van Avermaet (BMC), Tiesj Benoot (Lotto Soudal) and Arnaud Demare (FDJ) were all left in tatters by crashes.
Watch how the race unfolded with our highlights below.
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