I think when Sagan went with Kwiatkowski he was still unsure what the best thing to do was. He probably believed Etixx would help the chase.
But when Vanmarcke joined the couple and Trentin/Oss attacked he had to know this was very dangerous. That's why he chased the two italians himself and then pulled the group for 5-6 seconds. I have no idea why he stopped though, could very well be lack of legs.
But when Vanmarcke joined the couple and Trentin/Oss attacked he had to know this was very dangerous. That's why he chased the two italians himself and then pulled the group for 5-6 seconds. I have no idea why he stopped though, could very well be lack of legs.