Olympic 800m gold medallist Caster Semenya has won a human rights court appeal over the rules governing testosterone in athletics competitions.
The European Court of Human Rights ruled the double Olympic champion had been discriminated against.
The decision could force sport’s highest court to re-examine the regulations that force Semenya and other female athletes to artificially reduce naturally high testosterone levels in order to compete at top competitions such as the Olympics and world championships.
The court also ruled the runner was not allowed an “effective remedy” when the Court of Arbitration for Sport and Switzerland’s supreme court denied her two previous appeals against the rules.