By Richard Pagliaro Friday, January 23, 2026
Image credit: Steven Pisano/Wikimedia Commons
Jana Fetter The company was temporarily suspended after testing positive for three banned substances.
The 29-year-old Croatian was testing positive for three banned substances when he represented Croatia in the Billie Jean King Cup on November 16, 2025: SARM Ostarine (S-22), a metabolite of LGD-4033 and a metabolite of GW501516.
The International Tennis Integrity Agency announced her ban today.
Feit, who reached a career-high ranking of No. 97 in October 2017, did not appeal the mandatory suspension that took effect on December 22.
Below is ITIA’s press release regarding Fett’s positive test:
The sample was divided into A and B samples, and subsequent analysis found that sample A contained three banned substances: SARM Ostarine (S-22), a metabolite of LGD-4033, and a metabolite of GW501516. Sample B was analyzed on Wednesday, January 14, and confirmed the results of sample A.
According to the TADP, these substances are prohibited substances in the categories of other anabolic drugs (Section S1.2) and metabolic modulators (Section S4.4) of the 2025 Prohibited List.
As two of the substances were non-specified, a temporary suspension was imposed.
The ITIA announced that during the interim suspension, Fett is prohibited from “playing, coaching or participating in any tennis event authorized or sanctioned by an ITIA member (ATP, ITF, WTA, Tennis Australia, French Tennis Federation, Wimbledon and USTA) or any national association”.
Last April, Feit defeated former Wimbledon semifinalist Donna Vekic in the qualifying round to reach the last 16 in Stuttgart, but lost in straight sets to Iga Swiatek.
Fite reached the last 16 in Bastad last July but lost in the final rounds of qualifying at both the U.S. Open and Wimbledon. Recently, Fett has been playing on the Challenger Tour. Last October, she reached the quarter-finals of the WTT W75 event in Portugal.
