Caster Semenya

Caster Semenya is a South African middle-distance runner and two-time Olympic 800m champion, one of the most dominant runners in the event's history, whose career has also been shaped by a prolonged legal battle over World Athletics eligibility regulations.

Caster Semenya won two Olympic gold medals and three World Championship titles in the 800m, then spent the next seven years fighting through the Court of Arbitration for Sport, the Swiss Federal Supreme Court, and the European Court of Human Rights for the right to defend them.. She rose to global prominence at the 2009 World Championships in Berlin, winning the 800m title as an 18-year-old with a dramatic improvement in her personal best, a result that triggered international scrutiny and eligibility testing by the IAAF (now World Athletics). Semenya went on to dominate the women's 800m for over a decade, winning Olympic gold at the 2012 London and 2016 Rio Games (her 2012 silver was later upgraded to gold following the disqualification of the original winner for doping), and adding World Championship titles in 2011 and 2017 to her 2009 win. In 2017, she also won World Championship bronze in the 1500m, and the following year captured a rare 800m/1500m Commonwealth Games double in Gold Coast. From 2011, World Athletics introduced regulations restricting the participation of female athletes with differences of sex development (DSD) and naturally elevated testosterone levels in certain events, arguing they conferred an unfair competitive advantage. Semenya, who has always identified and competed as a woman, challenged these regulations through a series of legal proceedings including the Court of Arbitration for Sport, the Swiss Federal Supreme Court, and ultimately the European Court of Human Rights. The regulations, upheld in various forms through this process, effectively barred her from defending her Olympic and World titles in the 800m from 2019, prompting her to compete at longer distances, including the 5,000m, in pursuit of continued Olympic qualification. She has remained a prominent advocate for DSD athletes throughout the dispute.

Powerful, front-running middle-distance runner renowned for a strong, sustained pace

One of the most dominant 800m runners in history, and a central figure in ongoing global debates over sex, gender, and fairness in women's sport

• 2x Olympic champion, 800m (2012, 2016)
• 3x World Champion, 800m (2009, 2011, 2017)
• World Championship bronze, 1500m (2017)
• 2x Commonwealth Games champion, 800m and 1500m (2018)
• 4x Diamond League Final winner