Russian bobsledder Nadezhda Sergeeva has tested positive for a banned substance at the Winter Olympics.
Russian curler Alexander Krushelnitsky has been stripped of his PyeongChang Winter Olympics bronze medal after admitting doping, the Court of Arbitration for Sport says.
Norway's Marit Bjoergen becomes the most successful athlete in Winter Games history with 14 medals, while 15-year-old Alina Zagitova steals the show in figure skating with a record score of 82.92 points.
Many of gymnastics doctor Larry Nassar's victims said there were others to blame for enabling the doctor to continue with his abuse and they too needed to be held accountable.
Turkish athlete Ramil Guliyev won gold in the 200 metre sprint in London. It was Turkey's first ever men's gold at the World Championships.
Twice Tour de France champion Alberto Contador is one of six riders to have won all three Grand Tours in a 14-year professional career marred by a doping ban.
Chronic traumatic encephalopathy, known as CTE, is linked to repeated hits to the head that can lead to aggression and dementia. Football athlete Briana Scurry has suffered the consequences of the disease. Here is her story.
Former National Football League running back and actor has spent nine years in prison for his role in the September 2007 armed robbery of two sports memorabilia dealers at a Las Vegas resort and will walk out of prison in October.
The prosecutor's office accused the Real Madrid forward of evading €14.7 million in tax by using a business structure created in 2010 to hide his image rights income in Spain.
Sprinter Usain Bolt, who is the reigning 100 and 200 metre world champion and nine-time Olympic gold medalist, ran his final race on home soil.
The World Anti-Doping Agency's push to expand its operations comes at a time when concerns are being raised over its performance.
The 30-year-old athlete will retire from the sport after the world championships in London in August 2017.
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