The group is likely to stay away, right? Astana should be a good bet for a winner with three strong riders (Landa, Taraamae and Landa), but Arredondo is probably the best climber in the group. Lotto also has Gallopin and Wellens who could potentially win. If Martin gets away om a descent or on the flat you never know if he will be brought back.
I don't think Purito will be able to drop Henao. The Colombian looked the strongest yesterday but also on wednesday which was very much a Purito climb. Quintana I dont know what to expect from. Looked easy wednesday but disappointing yesterday.