The Maracana stadium erupts in jeers as Brazil's unpopular interim president Michel Temer opens the Rio Olympics and the hostility spreads far beyond the sports venue.

International Olympic Committee chief Thomas Bach demands a sweeping overhaul of the World Anti-Doping Agency (WADA) as Russian appeals against bans mounted just three days from the opening of the Rio Games.

Russian appeals against Olympic bans are piling up as IOC president Thomas Bach slams what he calls the "contemptuous" doping system blamed on the Moscow government.

Russian swimmers Vladimir Morozov and Nikita Lobintsev have been cleared to compete at the Rio Olympics, their representatives said Tuesday, though there was no official confirmation.

The international sports tribunal will decide appeals by Russian athletes against their ban from the Rio Olympics with the opening ceremony just four days away.

The International Olympic Committee says a three-member panel will make the "final decision" on which Russian athletes can compete in the Rio Games.

A three-member International Olympic Committee (IOC) panel will have the final say on which Russian athletes can compete at the Rio Games, reviewing all decisions taken by the international federations, the IOC said on Saturday.

Russia's sports minister says that the national team to compete in the Rio Olympics starting next week so far has 266 competitors.

Australia's Olympic delegation head Kitty Chiller questions Russia's determination to eliminate drug cheats.

The International Olympic Committee's decision to reject calls to ban all Russian competitors from the Rio Olympics could lead to "lesser protection for clean athletes," the World Anti-Doping Agency (WADA) says..

The International Olympic Committee (IOC) fails to demonstrate strong leadership on a sad day for clean sport when it declines to ban Russian athletes from the Rio Olympics, anti-doping officials say.

Russia insist it expects to avoid a blanket ban from the IOC on its competitors at the Rio Olympics despite its track and field squad losing an appeal over a suspension for state-sponsored doping.

A further 45 athletes test positive for banned substances after a second set of samples were re-analysed from the London and Beijing Olympics.

The Court of Arbitration for Sport (CAS) dismiss an appeal against a ban on Russia's track and field team for the Rio Olympic Games over state-run doping.

The Court of Arbitration for Sport says it had rejected Russia's appeal against the exclusion of its track and field athletes from the Rio Games starting on August 5.

The International Olympic Committee says it would take up to a week to decide whether to ban Russia from the Rio Olympics over its "state" doping machine.

The report to be released Monday into allegations of widespread state-sponsored doping in Russia has already sparked rumblings it could trigger the "nuclear option" of a full ban of Russia from the Rio Olympics.

Athletes from one sport should not be punished for the sins of those from another, the IOC president said on Wednesday,

Despite financial and organisational problems that have delayed other construction projects for the Rio de Janeiro Olympics, the largest athletes' village in the long history of the Games is unveiled in the city on Wednesday.

A senior International Olympic Committee (IOC) official says he takes allegations of illegal payments to help Tokyo secure the 2020 Games "seriously" but said his group will not conduct a probe of their own.