Operación Puerto doping case
The 2006 Tour had been plagued by the Operación Puerto doping case before it began. Favourites such as Jan Ullrich and Ivan Basso were banned by their teams a day before the start. Seventeen riders were implicated. American rider Floyd Landis, who finished the Tour as holder of the overall lead, had tested positive for testosterone after he won stage 17, but this was not confirmed until some two weeks after the race finished. On 30 June 2008 Landis lost his appeal to the Court of Arbitration for Sport, and Óscar Pereiro was named as winner.