Marketa Vondrousova, the 2023 Wimbledon singles champion, is suspended from professional tennis for four years after she refused an out-of-competition anti-doping test in December 2025. Multiple reports say the Tennis Integrity Agency (ITIA) announced the sanction following an independent tribunal hearing. The ITIA states that Vondrousova did not submit a sample when notified by a doping control officer at her home on the night of December 3, 2025. Sources agree the tribunal concluded there was no compelling justification for her failure to provide a sample after being notified.

Several outlets add that Vondrousova disputes the decision and says she has “never doped.” She cites personal circumstances, including mental stress, and describes concerns about the testing agent’s late arrival and identification. The ban length is described as a four-year period, with reporting also indicating it ends on June 21, 2030. The suspension is presented as a significant penalty for a refusal of testing, with some outlets noting it reflects the maximum sanction for a first offence under the relevant rules.