American world No 4 Jessica Pegula has slammed the four-year ban given to former Wimbledon champion Marketa Vondrousova for refusing an anti-doping test.
Vondrousova did not submit a sample when notified by a doping control officer during an out-of-competition test attempt at her home in December 2025.
The 27-year-old Czech, who won Wimbledon in 2023, claimed "months of physical and mental stress" affected her decision making, in addition to concerns for her safety.
Players are required to log their whereabouts for an allotted hour each day so that authorities can conduct anti-doping tests outside of competition.
Vondrousova's ban has sparked debate in the tennis world, with Pegula hitting out at the decision after her Wimbledon first-round win against Darja Vidmanova on Monday.
"It's just really unfortunate. I feel like for Marketa, I don't know the ins and outs of exactly what happened, it seems like there's a lot of 'he said, she said' kind of things going on right now," Pegula said.
"But I just think for something like that, for four years, you're ruining someone's career over something that could have really just been a complete misunderstanding.
"I just don't think that's fair. I think the sentencing is so harsh."
Vondrousova, who responded to the ban by insisting she "never doped", is believed to be considering a potential appeal to the Court of Arbitration for Sport.
"I don't know if she's going to appeal it with CAS or what's going on. I just think there has got to be a solution where we're not just totally destroying someone's career over something where she didn't even test positive," Pegula said.
The severity of Vondrusova's suspension stands in contrast to past bans handed to reigning Wimbledon champions Jannik Sinner and Iga Swiatek.
Sinner accepted a three-month ban last year after reaching an agreement with the World Anti-Doping Agency (WADA) in 2024.
The Italian had tested positive for the anabolic steroid clostebol, before being cleared by an independent tribunal who determined he was not to blame.
WADA, who had been seeking a ban of between one and two years for Sinner, appealed against that decision to (CAS) before the Italian agreed his short suspension.
Swiatek took a one-month ban in 2024 after testing positive for a banned substance.
The International Tennis Integrity Agency accepted that it was caused by contamination of the regulated non-prescription medication melatonin, manufactured and sold in Poland, which Swiatek took for jet lag and sleep issues.
"So I don't quite understand the difference between that and then obviously what happened with Sinner and Iga. They justified what the rules were and why it was the way it was," Pegula said.
"I don't think it makes sense to a person that's just looking at it common sense-wise. But I understand there should be some sort of punishment, because I know she's refused to take a test, and that's not good either."