We should remark though that it is impossible to measure the impact of famous doping cases like the 2006 Floyd Landis case or the 2010 Albert Contador case .
Both riders were accused of doping use after the finish of the Tour de France .
We should remark though that it is impossible to measure the impact of famous doping cases like the 2006 Floyd Landis case or the 2010 Albert Contador case , because both riders were accused of doping use after the finish of the Tour de France .