Tour de France Tour de France 2021, Stage 18: Pau – Luz Ardiden, 129.7 km

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They knew which climbs had double points.
All it takes is DQS to sabotage the breakaway for the green jersey and time limit for Pogacar to win KoM jersey.

It's not like there was anything any rider could to today to let the breakaway win, there was 0 shot at that.

Maybe you can argue the KoM hunters weren't good enough, or that O'Connor should've gone for the KoM, but whatever.