Marketa Vondrousova has lodged an appeal with the Court of Arbitration for Sport (Cas) against her four-year ban for refusing an anti-doping test.
The 2023 Wimbledon champion refused an out-of-competition test at her home in December 2025 and was suspended in June by the International Tennis Integrity Agency (ITIA). A hearing date has not yet been set by the court.
Vondrousova, 27, stated in April that when she refused the test on the evening of 3 December she was at “breaking point after months of physical and mental stress”.
She claimed that the officer did not follow “protocol” and it fell outside of her allotted whereabouts slot. The Czech signed a refusal form before taking her dog for a walk.
Tennis players are required to log their whereabouts for a specific hour each day with anti-doping authorities so they can be tested outside of competition, although tests can also occur outside these set windows.
The officer who visited her in December arrived at 8.15pm, outside her whereabouts submission slot for the day, and demanded an immediate test, which Vondrousova described as a “serious intrusion into my privacy”.
But a tribunal later ruled that the Czech had “no compelling justification” for refusing the test. A test taken three days later returned negative.
In a statement following her ban, Vondrousova said: “I have never doped, I have never had a positive test. Throughout my entire career I have undergone countless anti-doping controls and have always stepped on the court with a clear conscience.”
Vondrousova was previously ranked No 6 in the world but she has not played in 2026 and has fallen to No 153. She won a silver medal at the delayed Tokyo Olympic Games and reached the final of the 2019 French Open.
Her ban is set to expire on 21 June, 2030.
