Overview
- On December 3, 2025, a doping control officer visited Marketa Vondrousova’s Prague home, she refused to open the door, later met the officer outside while walking her dog, and signed a form declining the test.
- The independent tribunal published its full written report on July 31, 2026 and found Vondrousova offered "no compelling justification" for refusal after citing a WhatsApp message and other behavior that contradicted her safety and anxiety defence.
- A voluntary sample that Vondrousova arranged on December 7 returned negative, but the tribunal said that did not excuse the initial refusal and imposed the maximum four-year suspension.
- Vondrousova has not played since January, her ranking has fallen, and she is expected to file an appeal with the Court of Arbitration for Sport before the August 11 deadline to try to overturn or reduce a ban that would last until June 2030 if upheld.
- The case underscores that refusing or evading an out-of-competition test carries the same maximum sanction as a positive result and highlights that anti-doping rules allow testing outside a player’s one-hour whereabouts slot as a key enforcement tool.