Former British Olympian Roger Black has said the International Olympic Committee (IOC) are "passing the buck" by not banning Russia from Rio.
The 400m silver medallist told Good Morning Britain: "If there was ever an opportunity for the IOC to make a stance and say the future of the Olympics is a clean games, it was now.
"Russian athletes are already out in Rio with the less than two weeks to go before the Olympic Games and we don't know who is going to compete.
"What we're watching is an absolute mess and it's an opportunity completely missed."
The Australian government said Russia's participation in the Rio 2016 Games risks damaging the reputation of the Olympic movement.Read the full story ›
The International Tennis Federation (ITF) has said that seven Russian tennis players are eligible to compete in the Rio Games after "rigorous" anti-doping testing.
The ITF welcomes the decision of the IOC to permit clean athletes to compete in Rio 2016 and to let each International Federation determine the eligibility of its respective Russian athletes. The seven Russian tennis players who have been nominated to compete in Rio have been subject to a rigorous anti-doping testing programme outside Russia.
The ITF believes that this is sufficient for the seven Russian tennis players to meet the relevant requirement of today’s decision of the IOC Executive Board.
The ITF believes it is right that clean athletes are permitted to compete in Rio 2016 and looks forward to welcoming the Russian tennis players, along with all other nominated athletes, to Rio.
The International Olympic Committee (IOC) has ruled out a total ban on Russian athletes after revelations of state-sanctioned doping.Read the full story ›
Russia's banned track and field athletes are expected to find out whether they will be allowed to compete in the Rio Olympics Games.Read the full story ›
The World Anti-Doping Agency is calling for a ban of Russian athletes at the Rio Games after state-sanctioned doping was revealed.Read the full story ›
In a meeting on Tuesday, the International Olympic Committee agreed to a five-point plan to tackle doping in sport.Read the full story ›
The IAAF has said Russia will remain banned from all competitions after being found guilty of wide-spread state-sponsored doping.Read the full story ›
Jamaican 4x100m sprinter Nesta Carter had his 2008 Games samples re-examined, and they showed an adverse result.Read the full story ›
Re-tests of samples from eight Russian athletes who took part in the 2012 Olympics in London have tested positive for doping, the Russian Olympic Committee has said.
The committee said in a statement on its website that the International Olympic Committee had informed it of the positive doping results.
It did not reveal the names of the eight sports people but said they participated in three different types of sport.
Earlier in the week Russia announced that 14 of its athletes from the 2008 Beijing Olympics had tested positive for doping after their samples were re-tests.