evidence: Transgender swimmer Lia Thomas challenges ban before CAS Lausanne (AFP) – American swimmer Lia Thomas, who became the first transgender athlete to win a US national college title, is taking legal action in a bid to be allowed compete again in elite female competition, including the Paris Olympics. [...] On Friday, the Court of Arbitration for Sport (CAS) confirmed "the registration of the request for arbitration filed by US transgender swimmer Lia Thomas, aimed at challenging certain parts of World Aquatics' Policy on the eligibility for the men's and women's competition categories".