Athletics-Semenya out of World Championships after Swiss court reverses reprieve

Double Olympic champion Caster Semenya will not defend her 800-meters title at the World Championships in Doha in September after the Swiss Federal Tribunal reversed a ruling that temporarily lifted the IAAF's testosterone regulations imposed on her, a spokesman for the athlete said on Tuesday.

Semenya is appealing the Court of Arbitration for Sport (CAS) ruling on May 1 that supported the IAAF's regulations, which say XY chromosome athletes with differences in sexual development (DSDs) can race in distances from 400m to a mile only if they take medication to reach a reduced testosterone level.

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