Levi isn't strong enough for him to be the protected rider in a GC contender capacity. Other than a team defending yellow for a few days early, it's going to be up to BMC, Saxo and Radio-Schleck to control all the decisive stages. Everyone else will sit back and then take shots at opportune times. Levi and Martin both riding for high GC makes them a more serious threat, although I doubt any of the aforementioned teams will lose that much sleep over them.
That said, I don't think Martin is a serious contender. In yellow for a few days, yes. Top 10, most likely. Maybe even top 5 if everything goes right and he makes that his primary goal.
That said, I don't think Martin is a serious contender. In yellow for a few days, yes. Top 10, most likely. Maybe even top 5 if everything goes right and he makes that his primary goal.