Having won the grueling Tour of Flanders and punishing Paris-Roubaix, Fabian Cancellara says he’s tired and needs a break, opting out of the rest of the spring classics. We think that’s good. This kind of fatigue is what led the pro cycling world to performance-enhancement drugs. There are plenty of blood doping fixes Cancellara could turn to. Is this a sign that doping’s grip on pro cycling is finally losing its sway, or are we being naive even thinking such a thing?