Contador - who has won three Tour de France championships -- reportedly tested positive on July 21 this year with the analysis revealing traces of the banned steroid clenbuterol.
57902
Contador tests positive
94741
Giro d'Italia - Giro organisers unveil testing route
92895
WNBA's Taurasi tests positive for modafinil
169765
Spanish rider Antonio Colom tests positive for EPO
166475
Contador blames steak for positive doping test
48108
Three Greek weightlifters test positive for stimulants
85784
Botha returns a positive test
62105
Diana Taurasi reportedly tests positive for banned substance
153065
Willoughby tests positive
42347
Jamaican athlete commits doping violation
171122
Massa to undergo more tests
8656
Hope Solo tests positive for banned substance
145409
MVP Ryan Braun tests positive for performance enhancing drugs
96148
Beltran tests positive on Tour de France
44882
Contador will defend Tour de France title
5396
Landis accuses Lance Armstrong of involvement in doping
10388
Contador confirms he'll ride with Astana in 2009