LONDON — Coco Gauff expressed that an “overzealous” anti-doping official left her in tears, while Serena Williams termed the testing process as “exhausting.”
The protocols meant to shield tennis from doping controversies are currently under scrutiny, as players share their personal encounters within the system. This follows the significant four-year suspension imposed on 2023 Wimbledon champion Marketa Vondrousova, not for a positive test, but for her refusal to submit to one.
Players must allocate a 60-minute window each day for potential testing, with the International Tennis Integrity Agency stipulating that if a doping control officer “finds and informs a player outside that hour, compliance is mandatory.”
Clearly, effective communication between players and testers is essential.
“To be honest, some of them can be really aggressive, making you feel as if you have done something wrong,” Gauff, the seventh seed, shared after her opening round win at Wimbledon.
“Once, she contacted me outside my designated time. The way she talked to me left me in tears afterward,” the 22-year-old star disclosed. “Eventually, I realized I was right, and no action was needed on my part.”
Before her first match on Tuesday, Ajla Tomljanovic recounted her unsettling experiences.
“I find the system quite intimidating as it appears flawed,” she remarked. “I’ve faced several situations surrounding minor details, and when I turned to those in charge, they were less than helpful — I can’t say they don’t care, but there was certainly a lack of understanding or compassion, especially as I was nowhere near missing a test or showing a positive result.”
The Australian athlete mentioned her struggles with comprehending the testing app.
“I was new to the system and had two near-misses in a month, knowing a third could sideline me for two to three years,” she explained. “It’s not entirely my fault, and it shouldn’t lead to a ban that tarnishes my reputation. There is definitely room for improvement here.”
Williams, set for her Wimbledon return on Tuesday, revealed that the testing demands significantly influenced her desire to come back, remarking, “It’s incredibly challenging.”
Vondrousova, who made history as Wimbledon’s first unseeded female champion by defeating Ons Jabeur in the 2023 final, declined to take a test in December 2025 when a doping control officer rang her apartment intercom at 8 p.m.
This month, following an independent tribunal hearing, Vondrousova was sentenced to the maximum four-year ban for a first infraction.
The ITIA released a video detailing the case, indicating that Vondrousova contested the timing of the test since it fell outside her designated window.
The agency pointed out: “If a Doping Control Officer, or DCO, encounters a player outside the allotted hour, they are still required to complete the test.”
Vondrousova characterized the tester’s demeanor as “aggressive” and mentioned that the incessant ringing of the intercom induced considerable distress, according to the ITIA video.
The tribunal’s decision on June 22 reaffirmed that Vondrousova’s refusal was substantiated, with evidence presented failing to provide a legitimate justification for her actions.
The ITIA specified that under World Anti-Doping Agency regulations, “refusing tests carries penalties as severe as those for positive results.” The rationale being that a doping athlete may simply decline a test to escape with a lesser consequence.
Last year, the ITIA reported conducting over 8,000 tests during and outside of competitions, only receiving a few complaints. “We take all feedback seriously and urge players to voice their experiences,” noted the agency. Other organizations, like the U.S. Anti-Doping Agency, also carry out player testing.
On the topic of potential reforms, the ITIA acknowledged that tennis adheres to WADA guidelines, which “will undergo revisions in 2027. Part of this process involves consulting with athletes across the global sports community.”
“We recognize that the system can be daunting,” stated the ITIA, “but it is designed to safeguard players, not to ensnare them. We invite any player who has questions about a test or wishes to provide feedback to reach out.”
Concerns Raised Over Strict Four-Year Ban
Jessica Pegula, the fourth seed, expressed her empathy, stating that while she didn’t know the full details of Vondrousova’s case, she felt for her.
“To impose a four-year penalty for what could have been a simple misunderstanding seems quite disproportionate, jeopardizing someone’s career. I find the sentence to be excessively severe,” Pegula remarked.
“I fail to grasp the distinction between that case and what transpired with (Jannik) Sinner and Iga (Swiatek),” she continued. “They provided explanations regarding the rules and justifications for the outcomes.”
Defending men’s champion at Wimbledon, Sinner, accepted a three-month suspension in early 2025 following a settlement with WADA after two positive doping tests from the previous year. WADA had challenged the ITIA’s choice not to suspend him, deeming it an accidental contamination involving a banned anabolic steroid during a massage.
Swiatek, reigning champion for women at Wimbledon, received a one-month suspension in 2024 following a positive result for the banned substance trimetazidine, a heart medication. The ITIA acknowledged her explanation that the positive was unintended and stemmed from the contamination of a over-the-counter melatonin supplement she was using for jet lag.
