As a team manager, his team has been involved in some doping cases, with no rider being convicted for using doping while on his team. However, in Tyler Hamilton's book, "The Secret Race," is described how Riis actively encouraged the use of doping on the CSC team. Also, Ivan Basso, who was Team CSC's 2006 Tour de France general classification contender was removed from the team prior to the beginning of the Tour according to the UCI ProTour rules due to his possible involvement in the Operación Puerto doping case, an involvement confirmed by Basso himself in April 2007. Basso's contract with Team CSC has since ended.