Marketa Vondrousova, the 2023 Wimbledon champion, has been handed a four‑year suspension by the ITIA after refusing an out‑of‑competition anti‑doping test on December 3, 2025. The ban bars her from any ITF, WTA, ATP, Grand Slam or national federation event until June 21, 2030, when she will be 30 years old.

Vondrousova cited mental‑health fears after an agent knocked on her door outside the agreed hour, claiming the visit violated protocol. She left her apartment to walk her dog, signed a refusal form, and said an acute stress reaction clouded her judgment. The tribunal found no compelling justification for the refusal and therefore she faces a career‑ending sprint in tennis arena.

The ban echoes past cases like Jannik Sinner’s three‑month stint and Iga Świątek’s one‑month suspension, but sits at the upper end of penalties for refusal. Vondrousova can appeal to CAS in Switzerland, while her lawyer waits for the final written verdict. The decision underscores that refusal carries a harsher penalty than a positive test in the sport today and it stays firm.

Vondrousova’s statement on Instagram described weeks of uncertainty and fear, claiming she has never used performance‑enhancing drugs. She urged fans to respect her privacy as she contends with the suspension. The case adds to a growing list of high‑profile tennis suspensions, highlighting the strict enforcement of the ITIA’s whereabouts and testing protocols for clean sport and to maintain integrity players.