Caster Semenya's right to a fair hearing was violated by the Swiss Federal Supreme Court when she lost a 2020 appeal against World Athletics regulations that effectively barred her from competing, Europe's top court has ruled. The double 800m Olympic champion won a partial victory at the European Court of Human Rights in her long legal battle over athletics' sex eligibility rules. Semenya, 34, was born with differences of sexual development (DSD) and has been unable to compete in the 800m since