Looking back at the video, Cav was behind someone from Astana who wasnt going that fast. He also wasnt in the main lead-out on their left hand side. As he had to get round the Astana guy i think he just took a chance and hoped that he could catch the others by surprise, the Astana guy would act as a barrier and he could get a gap. In the end Farrar was able to jump across and got Cav's wheel before coming out of the slipstream and coming past. Just the way sprints play out.
Fernandez got a bit lucky in that he was right behind Cav and so was able to react quickly and get nearly onto his wheel. Having said that, being on Cav's wheel seems like a good tactic so maybe it was well played to him rather than being lucky.
Fernandez got a bit lucky in that he was right behind Cav and so was able to react quickly and get nearly onto his wheel. Having said that, being on Cav's wheel seems like a good tactic so maybe it was well played to him rather than being lucky.