Colombia's world champion track cyclist Fabián Puerta has been suspended following a failed test for steroid boldenone, it has been announced.
Almost 40 per cent of nearly 900 athletes surveyed by the United States Anti-Doping Agency (USADA) said they had been drug-tested five times or less in their entire careers.
Forty-one riders have been subjected to targeted drug tests at the Volta a Portugal in what is believed to be part of premeditated operation.
South Africa's Caster Semenya should now be officially confirmed as a double Olympic and triple world 800 metres champion after Russian rival Mariya Farnisova's disqualification was upheld following an unsuccessful appeal.
Reigning Athens Marathon champion Samuel Kalalei has become the latest Kenyan runner embroiled in a doping case after being suspended in connection with banned blood booster erythropoietin (EPO).
Rob Koehler has departed his position as World Anti-Doping Agency (WADA) deputy director general with immediate effect, insidethegames can reveal.
French footballer Samir Nasri has had his doping ban extended from six to 18 months after he used a drip treatment at a Los Angeles clinic in 2016.
CAS reject appeal from Russian athletes questioning validity of methods used in Beijing and London Olympic re-tests
The Court of Arbitration for Sport (CAS) have dismissed appeals from Russian athletes Maria Abakumova and Tatyana Lebedeva against doping sanctions, which will result in the pair losing Olympic medals earned at Beijing 2008.
The World Anti-Doping Agency (WADA) have reported an increase in the overall number of samples analysed and an increase in blood samples in their testing figures report for 2017.
IWF director general claims organisation has gone beyond IOC requirements prior to update on Olympic status
International Weightlifting Federation (IWF) director general Attila Adamfi has claimed they have gone beyond the requirements outlined by the International Olympic Committee (IOC) for the sport to preserve its Olympic status.
Reports have emerged in Russia that Iranian footballer Saeid Ezatolahi failed a drug test in out-of-competition testing shortly before the FIFA World Cup.
Medal winners in the sports of bowling, rowing and kickboxing has all been stripped of prizes won at last year's World Games in Wrocław after failing drugs tests, it has been confirmed.
Russia's World Cup star Denis Cheryshev has denied doping after his own father was reported as saying that he was injected with "growth hormone" in the build-up to the tournament.
FIFA have claimed that more than 2,700 drug tests have so far been carried out on players at the World Cup - with no positive tests recorded.
Spain's National Police have confirmed the arrest of six athletes for alleged involvement in an organisation distributing and selling performance enhancing drugs.