The fight against illegal performance enhancing substances has led the World Anti-Doping Agency, WADA, to develop strict rules. But some criminal athletes and doctors make sure to remain one step ahead in the race.
Professional cycling and track and field are among the more notorious sports for doping. And the former East German GDR was famous for encouraging systematic abuse of substances to ensure sporting success. DW coverage related to the topic is collated below.
Russia's Vladimir Putin said there were "major suspicions" that the US is trying to sway the presidential vote in his country by allegations of doping against Russia. Several Russian athletes lost their Sochi medals.
A former doctor has revealed the massive extent of doping of Chinese Olympic athletes during the 1980s and 1990s. The whistleblower has claimed more than 10,000 athletes were doped in the state-backed program.
The president of Germany’s athletics federation has expressed frustration over a delay in the release of a survey on doping. The report indicated that the problem in athletics could be worse than previously thought.
The 34-year-old Spaniard is considered one of the best riders of his time, but despite the success, some will remember him for his 2012 doping scandal. Contador will park his bike after next month's Vuelta in Spain.