IOC confirms 31 athletes could be banned from Rio after re-tests
After retests were carried out on over 400 doping samples from Beijing, 31 athletes face potential bans from this year's Olympics.
The IOC has announced 31 athletes from six sports could be banned from competing in the 2016 Olympic Games in Rio de Janeiro after 454 doping samples from the 2008 Games in Beijing were retested.
