# Vondroušová appeals four-year anti-doping ban > Live situation record from CLSTR: https://clstr.news/situations/vondrouov-antidoping-ban > Updated: 2026-08-26T17:56:10.000Z. Sources: 42. Developments: 4. Czech tennis champion Markéta Vondroušová, the 2023 Wimbledon winner, received a four-year suspension from the International Tennis Integrity Agency (ITIA) following her refusal of an out-of-competition anti-doping test at her Prague home on 3 December 2025. The test was requested at 20:05, outside the 60-minute window the athlete had previously declared. Vondroušová argued that the refusal was due to an acute stress reaction and safety concerns, citing the 2016 attack on fellow Czech player Petra Kvitová as a reason for her anxiety regarding strangers at her door. She also claimed the official did not clearly identify themselves. However, an independent tribunal rejected these explanations, stating they provided ‘no compelling justification’ and noting she had taken her dog for a walk shortly after the incident. The tribunal found she remained capable of rational decision-making. In addition to the refusal, the ITIA reported vulgar communications from the player, including a message to her agent, Andrew Paulson, describing the officer as ‘a stupid [person] from doping’. The four-year ban, effective from 22 June 2026 to 21 June 2030, remains in force despite subsequent negative tests in December 2025 and May 2026. Vondroušová has since appealed the decision to the Court of Arbitration for Sport (CAS). CAS has confirmed receipt of the appeal, though a hearing date has not yet been scheduled. Vondroušová has maintained her innocence, stating she has ‘never doped’. As of August 2026, the former world number six has not competed since January, and her ranking has dropped to 153. Legal analysts suggest her defense may attempt to reclassify the incident as a negligent failure rather than a voluntary refusal to seek a reduced sentence, or argue that her actions were a manifestation of a clinical condition rather than a deliberate attempt to evade rules. ## Claims - The ITIA issued a four-year suspension to Marketa Vondrousova in June. (disputed by 3 sources) - The suspension was for refusing an out-of-competition doping test on December 3, 2025. (disputed by 3 sources) - The Court of Arbitration for Sport confirmed that Marketa Vondrousova has filed an appeal. (corroborated by 3 sources) - The suspension is set to expire on June 21, 2030, if the appeal fails. (corroborated by 3 sources) - Vondrousova claimed she refused the test due to an acute stress reaction and safety concerns. (corroborated by 2 sources) - An independent tribunal ruled that Vondrousova provided no compelling justification for the refusal. (corroborated by 2 sources) ## Timeline ### 2026-08-26: Marketa Vondrousova appeals four-year anti-doping ban to CAS Former Wimbledon champion Marketa Vondrousova has appealed her four-year anti-doping suspension to the Court of Arbitration for Sport, citing safety concerns during the testing process. 5 sources. https://clstr.news/cluster/marketa-vondrousova-appeals-four-year-anti-doping-ban-to-cas ### 2026-08-24: Marketa Vondrousova appeals four-year doping ban to CAS Former Wimbledon champion Marketa Vondrousova has appealed a four-year doping-related suspension to the Court of Arbitration for Sport (CAS) following a refused test in December 2025. 17 sources. https://clstr.news/cluster/marketa-vondrousova-appeals-four-year-doping-ban-to-cas ### 2026-08-02: Markéta Vondroušová receives four‑year doping ban Markéta Vondroušová was suspended for four years by the ITIA after refusing an out‑of‑hours doping test and sending a vulgar message to her agent. 5 sources. https://clstr.news/cluster/markta-vondrouov-handed-fouryear-ban-for-refusing-doping-test ### 2026-07-31: Marketa Vondrousova receives four-year ban for refusing anti‑doping test Marketa Vondroušová, 2023 Wimbledon champion, was suspended for four years after refusing a doping test on 3 Dec 2025; the ban runs 22 Jun 2026‑21 Jun 2030 with a 21‑day appeal window to CAS. 18 sources. https://clstr.news/cluster/marketa-vondrousova-handed-four-year-suspension-for-doping-test-refusal --- Cite as: Vondroušová appeals four-year anti-doping ban. CLSTR, https://clstr.news/situations/vondrouov-antidoping-ban