Jamaican runner Nesta Carter filed an appeal with the Court of Arbitration for Sport on Wednesday regarding a doping positive from the 2008 Olympics, which cost Usain Bolt one of his nine golds.
Sprinter Justin Gatlin, who is competing in Rio despite twice testing positive for banned substances in the past, brushed off criticism by U.S. swimmer Lilly King.
It didn't take long for Justin Gatlin's name to get dragged into the doping drama swirling at the Olympics.
Newly minted gold medalist Lilly King says dopers, including American sprinter Justin Gatlin, shouldn't be allowed to compete.
The IOC says it will "explore the legal options" for a possible total ban on the Russian team from the Olympics in Rio de Janeiro.
A full Russian ban from next month's Olympics was among a list of requests by WADA following a report that confirmed claims of state-backed Russian cheating at the Sochi Olympics and beyond.
