Markéta Vondroušová Receives Four-Year Ban for Refusing Anti-Doping Test

On Monday, the International Tennis Integrity Agency (ITIA) announced that Czech player Markéta Vondroušová has been suspended for four years after refusing an out-of-competition anti-doping test at her home on 3 December 2025. The Doping Control Officer arrived around 8 p.m., outside the one-hour testing window Vondroušová had previously declared, and she signed a refusal form. An independent tribunal found no compelling justification and imposed a ban lasting until 21 June 2030.

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Vondroušová, 26, won Wimbledon in 2023 as the first unseeded female champion, beating Ons Jabeur, and reached a career-high ranking of No. 6. She was also a French Open finalist in 2019. She joins other high-profile players such as Jannik Sinner, Iga Swiatek and Simona Halep who have faced doping investigations.

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Professional tennis players must designate a daily one-hour window for surprise testing and must provide a sample if located outside that window; refusal triggers a standard four-year sanction.

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3 December 2025 – test refusal; April 2025 – Vondroušová posted on Instagram about mental stress; Monday – ITIA announced the four-year ban; 21 June 2030 – ban expiry.

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ITIA CEO Karen Moorhouse said the sanction upholds the principle that refusing a test should not advantage a player over testing positive. Vondroušová’s Instagram message claimed she has never doped, never tested positive, and that a subsequent test three days later was negative. She was represented by attorney Howard Jacobs. ITIA senior director Nicole Sapstead declined to disclose details of Vondroušová’s prior anti-doping history.

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Vondroušová cited mental stress and safety concerns, saying the tester failed to identify herself when arriving late at night. The tribunal, however, found these explanations insufficient to excuse the refusal.

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• “We recognize this is a significant ban. And the reason for that, stepping back, is that you can't have an anti-doping system where a player is in a better place by refusing to take a test than they would by taking a test and testing positive.” — Karen Moorhouse, ITIA CEO

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• “It is very tough for me to talk about this, but I want to be transparent with you about my mental health,” — Markéta Vondroušová

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• “I have never doped. I have never had a positive test,” — Markéta Vondroušová

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• “Unpredictable testing is an essential tool to protect clean sport,” — Karen Moorhouse

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The ITIA did not confirm whether any inconsistencies exist in Vondroušová’s prior testing record, and her claim that the tester failed to identify herself was not corroborated by the tribunal’s findings.

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Vondroušová may appeal to the Court of Arbitration for Sport in Switzerland; the ban remains in force until mid-2030, and Wimbledon is set to start next week.

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