France, July 10 -- A top European court Thursday said a Swiss court did not give double Olympic champion Caster Semenya a fair trial in a much-awaited appeals ruling over contested gender testing.

The European Court of Human Rights' decision comes after a row engulfed the 2024 Paris Olympics over the gender of an Algerian boxing champion.

Semenya, a 34-year-old South African runner, is classed as having "differences in sexual development", but has always been legally identified as female.

She has been unable to compete in her favoured 800m category since 2018, after she refused to take drugs to reduce her testosterone levels under new rules from World Athletics, the governing body for track and field.

Semenya told journalists the ECHR...