Marketa Vondrousova has been charged by the International Tennis Integrity Agency after an out-of-competition drug test in December and has vowed to clear her name. The 2023 Wimbledon champion faces a potential ban of up to four years if the charge is upheld.

The ITIA accused Vondrousova of “refusing or failing to submit to Sample collection without compelling justification after notification by a duly authorized Person.” According to the player’s account, an officer rang her doorbell after 8 p.m., would not identify himself and demanded an immediate urine test. In an Instagram Story at the time she called it a “serious intrusion of my privacy.”

On Friday Vondrousova posted a longer explanation on social media, detailing the mental strain of injuries, sleep problems and “years of hateful messages and threats” that she said affected her sense of safety. “When someone rang my door late at night without properly identifying themselves or following protocol—I reacted like a person who felt scared,” she wrote. “In that moment, it was about feeling safe, not about avoiding anything.”

Vondrousova also says the unexpected visitor triggered memories of her countrywoman Petra Kvitova’s 2016 stabbing. She wrote that “Experts confirmed I suffered an Acute Stress Reaction (F43.0) and Generalized Anxiety Disorder (F41.1).” She added that “In that moment, fear clouded my judgment and I just couldn’t process the situation rationally. After what happened to Petra (Kvitova), we don’t take strangers at our door lightly.” The earlier headline wording noted that “fear clouded (my) judgment,” reflecting that same explanation.

The ITIA confirmed an investigation is under way and issued the statement: “We can confirm that an investigation is underway and the player has been charged with refusing a test. At this stage, we are not able to comment any further on the specifics.” The charge does not carry an automatic suspension.

Vondrousova has not played a singles match since January because of a shoulder injury, but she did appear for Czechia in Billie Jean King Cup doubles over the weekend. Tennis players are required by the ITIA and WADA to log their Whereabouts, including a daily one-hour window, though out-of-competition testing can occur outside those designated windows.

Episode 6 of The Big T is now available at TheBigT.com. Hosts Andrea Petkovic and Mark Petchey open with a wide-ranging conversation that moves from recent sporting events into tennis proper.

They first discuss the Winter Olympics and the Super Bowl, and Petkovic offered a measured take on the halftime performance: “I think art is not supposed to be for everybody. It is supposed to represent something of what the artist wants to express, from their own life experience, and from their own self.

A lot of people will resonate with that, and many people won’t. Andrea Petkovic, on Bad Bunny

Petch, for his non-tennis take, discussed the daring but ultimately dangerous decision Lindsay Vonn made to take part in the Winter Games after tearing her ACL just days earlier.

“People in that sphere, who have done absolutely incredible things, have absolute autonomy about deciding whether they want to go out and perform. If we didn’t allow great athletes and great people to try and have great failures, we’d still be living in caves.

I kind of found it inspiring. I know there’s a lot of people that don’t feel that. Mark Petchey, on Lindsay Vonn

The episode then turns to a story reshaping the tennis calendar: the possibility of Serena Williams returning to competition. It has been more than three years since the 23-time Grand Slam singles champion last played. On February 22 she will be eligible to compete after filing the required paperwork with the International Tennis Integrity Agency, the sport’s drug-testing organization.

“There’s no question there is a plan, there’s something that is bubbling around in the background,” says Petchey. “Austin starts on February 23rd…” noted Petkovic with a smile, having already looked at the calendar. (Venus Williams has already accepted a wild card into the tournament.)

“If she’s going to do this,” says Petchey, “then why would not turn up at Indian Wells and Miami and play doubles with Venus?”

Petkovic notes that Williams has returned to the anti-doping list for six months, exposing herself and her family to additional scrutiny. “She is planning something big, and personally cannot wait!”

Petchey and Petkovic also dig into a new and perhaps unlikely rivalry between Patrick Mouratoglou and Jo-Wilfried Tsonga. Listen to the full episode at TheBigT.com or call 844-678-BIGT for more.

Serena Williams tempered a December social-media denial of a comeback when she addressed the topic during a recent morning interview. In early December she posted on X, “Omg yall I’m NOT coming back. This wildfire is crazy-,” but her responses in the studio that followed were more measured.

Asked about a possible return while promoting a Super Bowl ad for Ro, a health company that markets and prescribes GLP-1 drugs, Williams smiled and pushed back at the line of questioning. “I mean, really? Are you asking this on the ‘TODAY’ show?’ Oh my goodness,” she said, drawing laughter. “I’m just having fun and enjoying my life right now,” she added.

Williams, who shares daughters Olympia, 8, and Adira, 2, with her husband Alexis Ohanian, described herself as a “full-time, stay-at-home” mom and has even listed her occupation as “housewife” on a recent form. She has not labeled the season she stepped away in 2022 as formal retirement.

When pressed about reports that she had reentered the drug testing pool, Williams laughed: “Did I reenter? I don’t know if I was out. Listen, I can’t discuss this.” Co-host Savannah Guthrie suggested that the moment could settle speculation: “OK, I’m just saying if I wanted to put it to bed, this would be a good moment. To put the retirement rumors to bed,” to which Williams quipped: “I want to go to bed. It’s early.”

Public and media interest in a potential comeback has centered in part on the 2028 Olympic Games in Los Angeles. The Williams sisters won Olympic doubles gold in 2000, 2008 and 2012, and fan speculation has grown since Venus Williams returned to competition last summer after more than a year away. At that time Venus said, “I don’t ask those questions.” She added, “We always did everything together, so of course I miss her. But if she comes back, I’m sure she’ll let y’all know,” leaving the question open rather than settled.