The latest revelation of Russian doping won't be the last. National self-interest and corruption have blighted sport since the professional era began.
Calls for an independent global drug-testing agency are growing as it becomes clear many nations' procedures fall well below expected standards.
The IAAF has suspended Kenyan athletes Koki Manunga and Joyce Zakary after they tested positive for doping at the World Championships in Beijing.
Olympic champion Sally Pearson fears the 2016 Rio Games will be tainted by drug cheats, as the sport faces explosive allegations of mass doping.
According to Athletics Kenya President Isaiah Kiplagat 32 cases of doping in Kenyan sports is better than what other federations have had to report.
IAAF Anti-Doping Director Gabriel Dolle, leaves his position under suspicions of colluding in a case of doping.
Croatian Marin Cilic has emerged with a "miracle" to win the US Open following months held under a doping ban.
Former 100m world record holder Asafa Powell slammed the 18-month doping ban meted out to him, calling it "unfair" and "unjust".
The members of an independent commission that will probe cycling's doping past since the Lance Armstrong scandal have been named.
Former head of world cycling Hein Verbruggen has angrily rejected claims from Lance Armstrong that he helped cover up a positive drug test.
Kenya has named a task force to probe doping allegations, a day before the distance running giant was to receive criticism at an anti-doping summit.
Disgraced cyclist Lance Armstrong has said he will testify with "100% transparency and honesty" at any independent enquiry into doping in cycling.
Disgraced cyclist Lance Armstrong, who is banned from most competitive sports for life, will take part in a regional swimming championship in Texas.
China's anti-doping head has said he was "shocked" after an anti-doping agency alleged the country produces large amounts of illegal substances.
Don't be fooled: the only thing choking up Lance Armstrong is the string of lawsuits he has to settle. But he'll recoup through Oprah's redemption.
Lance Armstrong could lose more than his ravaged reputation if he confesses to doping this week during a television interview with Oprah Winfrey.
Lance Armstrong will discuss the doping scandal that dramatically brought down his cycling career during an interview with Oprah Winfrey next week.
Spanish cyclist Roberto Heras has reclaimed his crown for the 2005 Tour of Spain after the Supreme Court overturned a positive doping test.
Cyclists who dope themselves with EPO may not gain any performance advantage even though they are putting their health at risk, scientists said.