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South African Institute for Drug-Free Sport (Saids) chief executive officer Khalid Galant said the specialised nature of testing for testosterone played a role in sprinter Thando Dlodlo being suspended and subsequently banned later than he should have.
The Olympics were stalked by politics, with several countries staging a diplomatic boycott over China's human rights record, and the spectre of invasion of Ukraine by Russia, with President Vladimir Putin attending the opening ceremony in a show of solidarity against the West with President Xi Jinping.
Great Britain were on Friday stripped of the silver medal they won in the men's 4x100 metres relay at last year's Tokyo Olympics after CJ Ujah was found to have committed a doping violation.
Nigeria's 2008 Olympics long jump silver medalist Blessing Okagbare has been banned for 10 years for doping, the Athletics Integrity Unit (AIU) announced on Friday.
"When I was three years old I would tell my mother, I want to be an Olympic champion," she said after she led the Russians to gold in the team event on February 7.
The figure skating events have been almost completely overshadowed by Russian Kamila Valieva’s positive doping test but the flamboyant French duo shone through the gloom, finishing with a record total of 226.98.
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The case will be decided by the Court of Arbitration for Sport before February 15, when the 15-year-old is scheduled to take part in the individual event at the Olympics, the International Testing Agency (ITA) said in a statement.