Former Wimbledon champion Marketa Vondrousova has been suspended from tennis for four years after refusing to provide a sample during an out-of-competition anti-doping test, the International Tennis Integrity Agency said Monday.
The ban, one of the most significant anti-doping sanctions handed to a recent Grand Slam champion, runs until June 21, 2030. It lands just one week before the start of Wimbledon, where Vondrousova made history in 2023 by becoming the first unseeded woman in the Open Era to win the singles title at the All England Club.
According to the ITIA, Vondrousova did not submit a sample when notified by a doping control officer during an out-of-competition test attempt at her home on the evening of December 3, 2025. An independent tribunal ruled that the Czech player had committed an anti-doping rule violation by refusing or failing to submit to sample collection without compelling justification.
The ruling does not say Vondrousova failed a drug test. That distinction matters. Her sanction comes from the refusal itself, which tennis anti-doping rules treat with the same starting point as a positive test because allowing a shorter penalty for refusal could create an incentive for players to avoid testing.
Vondrousova had contested the charge. She previously said the late-evening visit left her frightened and that she was dealing with serious physical and mental strain at the time. Her side argued that anxiety, stress and safety concerns affected her judgment, while also questioning aspects of the testing visit.
The tribunal rejected that defense, concluding there was no compelling justification for the refusal. The timing makes the decision even more dramatic. Wimbledon begins June 29, and Vondrousova’s name is now removed from the conversation before the tournament even starts. Three years ago, she stunned the field in London, beating Ons Jabeur in the final and turning one of tennis’s most unlikely Grand Slam runs into history. Now, at 26, she faces the possibility of missing the rest of her prime years unless the sanction is reduced on appeal.
Vondrousova’s career had already been interrupted by injuries. After her Wimbledon breakthrough, she reached a career-high ranking of No. 6, but her momentum slowed through recurring physical problems. Her official WTA profile currently lists her at No. 122, a steep fall for a player who was once one of the most dangerous left-handed shotmakers on tour.
The suspension also carries restrictions beyond match play. While banned, Vondrousova is prohibited from competing in, coaching at, or attending events sanctioned by the major tennis bodies, including the WTA, ITF, ATP, Grand Slam tournaments and national associations.
The ITIA defended the ruling as part of the sport’s broader anti-doping structure. The agency said unpredictable testing remains essential to clean competition and emphasized that players can be tested outside competition, including away from tournament sites.
For tennis, the case is uncomfortable on several levels. It involves a recent Wimbledon champion, a late-night home testing attempt, mental health claims, player safety concerns and the hard line of anti-doping rules. It also arrives during one of the sport’s most visible weeks, with Wimbledon about to begin and the grass-court season moving into its biggest stage.
Vondrousova has the right to appeal the decision to the Court of Arbitration for Sport. Until then, the sanction stands, and one of Wimbledon’s most surprising champions is facing a four-year absence from the sport.
