LAUSANNE - Sport's top court upheld an appeal by World Athletics against a ruling by the federation's own disciplinary tribunal which had cleared Nigerian-born Salwa Eid Naser of Bahrain of missing doping tests.
The ruling by the Court of Arbitration for Sport means she will be unable to take part in the Tokyo Olympics that begin next month.
Naser, 23, stunned the athletics world when she powered to the third-fastest 400m in history to take the world title in Doha in 2019.
Her time of 48.14sec has only been bettered by Marita Koch of the then-East Germany and the Czech Republic's Jarmila Kratochvilova in the 1980s.
Naser was initially charged with breaking rules governing her availability to undergo anti-doping testing and provisionally suspended in June last year.
But the Athletics Integrity Unit (AIU) disciplinary tribunal ruled in October that Naser had not violated anti-doping rules in relation to both missing tests and providing information relating to those tests.
CAS overturned that decision and ruled that the two-year ban should begin on Wednesday. - AFP, 1 July, 2021
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