The International Tennis Integrity Agency (ITIA) today revealed that Croatian tennis player Jana Fett has been provisionally suspended under the Tennis Anti-Doping Programme (TADP), as three banned substances have been found in her sample taken in November 2025.
The case originates from an in-competition drug test conducted on November 16, 2025 during the Billie Jean King Cup play-offs in Varazdin, where Fett was representing Croatia on home soil. Three prohibited substances were detected in her sample: SARM Ostarine (S-22), a metabolite of LGD-4033, and metabolites of GW501516.