Jana Fett, ranked No. 189 in the world, tested positive for ostarine, LGD-4033, and GW501516.
The ITIA notified Fett of the violation on Dec. 22, and the B sample confirmed the A sample’s findings on Jan. 14.
Fett has chosen not to appeal the provisional suspension.
Fett stated on Instagram that she has never knowingly or intentionally taken any prohibited substances and is working to prove her innocence.
Zdravko Marić, president of the Croatian Tennis Federation, believes Fett unintentionally ingested the banned substances.
Jana Fett, a 29-year-old Croatian tennis player, faces a provisional suspension following a positive test for three banned substances. The ITIA reported that the sample was collected during the Billie Jean King Cup playoffs in November 2025. The substances found in Fett’s sample include ostarine (an anabolic steroid), LGD-4033 (an experimental drug for muscle atrophy), and GW501516 (a substance banned for human consumption due to links to rapid cancer development in mice).
Fett, who reached a career-high ranking of No. 97 in 2017, denies intentional use and is working with advisers to prove her innocence. The Croatian Tennis Federation supports Fett, suggesting unintentional ingestion. While Fett has the option to appeal the suspension, she has not yet done so. This case adds to a list of doping incidents in tennis, highlighting the ongoing challenges in maintaining the integrity of the sport. Other players, such as Jannik Sinner and Iga Świątek, have faced similar situations in recent years, underscoring the importance of strict anti-doping measures.
Q: What substances did Jana Fett test positive for?
Ostarine, LGD-4033, and GW501516.
Q: What was Jana Fett’s reaction to the suspension?
Fett claims she has never knowingly or intentionally taken any prohibited substances and is working to prove her innocence.
Q: Has Jana Fett appealed the suspension?
No, Fett has chosen not to appeal the provisional suspension.
Jana Fett’s suspension highlights the strict anti-doping measures in professional tennis.
The case underscores the risks athletes face regarding unintentional ingestion of banned substances.
Readers should be aware of the substances involved and their potential health risks.
It’s important to follow the story as it develops to see if Fett can prove her innocence.
Do you think unintentional ingestion should be a valid defense in anti-doping cases? Share this article with others who need to stay ahead of this trend!
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