Jana Fett (; born 2 November 1996) is a Croatian inactive tennis player. On 30 October 2017, Fett reached her best singles ranking of world No. 97, and on 21 May 2018, she set her highest doubles ranking of No. 348. Fett has won nine singles and five doubles titles on the ITF Women's Circuit.

Career 2014–2015 On the ITF Junior Circuit, Fett had a career-high ranking of No. 12, which she achieved on 24 February 2014. She was the runner-up at the 2014 Australian Open girls' singles event, wherein she fell to Elizaveta Kulichkova in the final.

Fett's biggest title to date was at the 2015 Dunlop World Challenge, where she won the singles title defeating Luksika Kumkhum in the final.

2017: WTA Tour debut, two semifinals, and top 100 At the 2017 Hobart International, she qualified for her first main draw of a WTA tournament. She reached her first WTA Tour semifinal but lost to eventual champion and fellow qualifier, Elise Mertens.

Later in the year, she reached her second semifinal at the Japan Women's Open, again coming through qualifying, while also scoring her first victory over a top-20 player, the top seed Kristina Mladenovic. She lost to fellow qualifier Miyu Kato, after failing to convert a match point. As a result, she made her top 100 debut on 18 September 2017.

2018: Major debut and first win At the 2018 Australian Open, she appeared in the main draw of a Grand Slam tournament for the first time as a direct entry and recorded her first major win over Misa Eguchi. In the second round, she played against second seed Caroline Wozniacki and had two match points, leading 40/15 at 5–1 in the third set. However, she lost that game and the successive five games to yield the match to the eventual tournament champion.

2022–2024: WTA 125 final, Roland Garros & WTA 1000 debuts She qualified for the main draw of the 2022 Wimbledon Championships after three years of absence at the All England Club where she lost to world No. 1, Iga Świątek.

She reached the final at the WTA 125 2023 Midland Tennis Classic but lost to first-time WTA Challenger titlist Anna Kalinskaya.

In April 2024, Fett won the biggest title in her career at the W100 Oeiras Open. On her debut at the French Open, she entered the main draw as a lucky loser and recorded a first round win over Jéssica Bouzas Maneiro, then losing her next match to Marie Bouzková.

At the Jasmin Open, Fett reached the second round defeating Mayar Sherif before losing to Sara Sorribes Tormo in three sets. The following week at the 2024 Thailand Open 2, she reached the quarterfinals, after defeating Zheng Saisai, and eighth seed Varvara Gracheva by retirement, before going out to eventual champion Rebecca Šramková.

She entered the main draw of the WTA 1000 China Open as a lucky loser making her debut at this level, and recorded her first WTA 1000 win over wildcard entrant Wang Meiling. Fett lost in the second round to ninth seed Daria Kasatkina.

2026: Anti-doping suspension In January, the International Tennis Integrity Agency (ITIA) announced that Fett had been provisionally suspended since 22 December 2025, after testing positive for three prohibited substances, namely ostarine, GW501516 and LGD-4033, while representing Croatia in the BJK Cup on 16 November 2025.

Grand Slam performance timeline

Tournament2016201720182019202020212022202320242025 Australian OpenQ2A2RQ1AQ2Q2AQ11R1–2 French OpenAQ2Q1AQ1Q2Q1A2RQ21–1 WimbledonAQ31RANHQ21RAQ1Q30–2 US OpenAQ3Q3AAQ1AAQ1Q30–0Win–loss 0–00–01–20–00–00–00–10–01–10–12–5

WTA 125 finals Singles: 1 runner-up ResultW–LDateTournamentSurfaceOpponentScoreLoss 0–1 Midland Tennis Classic, United States Hard (i) Anna Kalinskaya 5–7, 4–6

ITF Circuit finals Singles: 14 (9 titles, 5 runner-ups) LegendW100 tournaments (1–0)$75,000 tournaments (1–0)W60/75 tournaments (1–1)W25 tournaments (2–3)W10/15 tournaments (4–0)Finals by surfaceHard (5–3)Clay (3–1)Carpet (1–1) ResultW–LDateTournamentTierSurfaceOpponentScoreWin 1–0 Aug 2014ITF Ostrava, Czech Republic10,000 Clay Lenka Kunčíková 6–4, 6–3Loss 1–1 Sep 2014ITF Bol, Croatia10,000 Clay Iva Mekovec 4–6, 1–6Win 2–1 Dec 2014ITF İstanbul, Turkey10,000 Hard (i) Olga Ianchuk 6–2, 6–4Win 3–1 Apr 2015ITF Dijon, France15,000 Hard (i) Marianna Zakarlyuk 6–3, 6–4Loss 3–2 Oct 2015ITF Istanbul, Turkey25,000 Hard (i) Ivana Jorović 3–6, 5–7Win 4–2 Nov 2015GB Pro-Series Loughborough, UK15,000 Hard (i) Cristiana Ferrando 6–2, 6–1Win 5–2 Nov 2015Toyota World Challenge, Japan75,000 Carpet (i) Luksika Kumkhum 6–4, 4–6, 6–4Loss 5–3 Nov 2019ITF Solarino, ItalyW25 Carpet Giulia Gatto-Monticone 6–2, 3–6, 5–7Loss 5–4 Apr 2022ITF Nottingham, UKW25 Hard Eudice Chong 2–6, ret.Win 6–4 Oct 2022Trnava Indoor, SlovakiaW25 Hard (i) Natália Szabanin 6–3, 6–2Win 7–4 Aug 2023ITF Vigo, SpainW25 Hard Lesley Pattinama Kerkhove 6–7(5), 6–3, 6–1Loss 7–5 Oct 2023Toronto Challenger, CanadaW60 Hard (i) Marina Stakusic 6–3, 5–7, 3–6Win 8–5 Apr 2024Split Open, CroatiaW75 Clay İpek Öz 6–0, 6–4Win 9–5 Apr 2024Oerias Open, PortugalW100 Clay Panna Udvardy 6–0, 6–2

Doubles: 10 (5 titles, 5 runner-ups) LegendW75 tournamentsW25 tournaments (2–3)W10 tournaments (3–2)Finals by surfaceHard (3–4)Clay (1–1)Carpet (1–0) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Apr 2013ITF Bol, Croatia10,000 Clay Bernarda Pera Barbora Krejčíková Polina Leykina 3–6, 3–6Win 1–1 Mar 2014ITF Sharm El Sheikh, Egypt10,000 Hard Oleksandra Korashvili Ola Abou Zekry Mayar Sherif 6–4, 7–5Win 2–1 Aug 2014ITF Vinkovci, Croatia10,000 Clay Adrijana Lekaj Lilla Barzó Ágnes Bukta 6–3, 7–5Win 3–1 Dec 2014ITF İstanbul, Turkey10,000 Hard (i) Adrijana Lekaj Ayla Aksu İpek Soylu 6–3, 6–4Loss 3–2 Mar 2015ITF Oslo, Norway10,000 Hard (i) Adrijana Lekaj Justyna Jegiołka Eva Wacanno 1–6, 1–6Loss 3–3 Oct 2015ITF Istanbul, Turkey25,000 Hard (i) Cristina Dinu Başak Eraydın Polina Leykina 5–7, 7–6(2), [5–10]Win 4–3 Oct 2016ITF Hamamatsu, Japan25,000 Carpet Ayaka Okuno Hsu Chieh-yu Justyna Jegiołka 4–6, 7–6(5), [12–10]Loss 4–4 Feb 2019GB Pro-Series Glasgow, UK25,000 Hard (i) Freya Christie Lesley Kerkhove Anna Zaja 4–6, 6–3, [3–10]Win 5–4 May 2019Torneo Conchita Martínez, Spain25,000 Hard Dalma Gálfi Despina Papamichail Nina Stojanović 7–6(2), 6–2Loss 5–5 Oct 2020ITF Porto, Portugal25,000 Hard Erin Routliffe Jamie Loeb Ana Sofía Sánchez 6–2, 3–6, [8–10]

Fed Cup/Billie Jean King Cup participation Singles (0–6) EditionStageDateLocationAgainstSurfaceOpponentW/LScore 2019 Z1 R/R 7 February 2019 Bath (GBR) Georgia Hard (i) Ekaterine GorgodzeL 6–4, 3–6, 5–7 8 February 2019 Serbia Olga DanilovićL 6–2, 2–6, 6–7(7–9) Z1 P/O 9 February 2019 Hungary Réka Luca JaniL 6–3, 2–5 ret. 2020 Z1 R/R 5 February 2020 Tallinn (EST) Bulgaria Viktoriya TomovaL 2–6, 4–6 7 February 2020 Ukraine Elina SvitolinaL 3–6, 6–3, 1–6 Z1 P/O 8 February 2020 Italy Camila GiorgiL 6–7(4–7), 4–6

Doubles (3–1) EditionStageDateLocationAgainstSurfacePartnerOpponentsW/LScore 2019 Z1 R/R 6 February 2019 Bath (GBR) Turkey Hard (i)Darija Jurak Çağla Büyükakçay Pemra ÖzgenW 6–4, 6–4 2020 Z1 R/R 5 February 2020 Tallinn (EST) Bulgaria Isabella Shinikova Viktoriya TomovaW 6–2, 3–6, 6–12025P/O 15 November 2025Varaždin, Croatia ColombiaPetra Marčinko Yuliana LizarazoCamila OsorioW 6–4, 6–3 16 November 2025 Czech Republic Lucie HavlíčkováLinda NoskováL 2–6, 6–3, 3–6

Head-to-head records Double bagel matches (6–0, 6–0) ResultW–LYearTournamentTierSurfaceOpponentRankLoss0–12023Hong Kong OpenWTA 250Hard Anastasia PavlyuchenkovaNo. 611R

Junior finals Grand Slam tournaments Girls' singles: 1 (runner–up) ResultYearTournamentSurfaceOpponentScoreLoss 2014 Australian Open Hard Elizaveta Kulichkova 2–6, 1–6

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