Jil Belén Teichmann (born 15 July 1997) is a Swiss professional tennis player. She has been ranked by the WTA as high as No. 21 in singles and No. 73 in doubles.
Teichmann has won two titles in singles and two in doubles on the WTA Tour, along with two WTA 125 singles and one doubles titles. In addition, she won six singles titles and five doubles titles on the ITF World Tour.
A former junior world No. 3, Teichmann won a major title in girls' doubles at the 2014 US Open. That year, she also won a gold medal for Switzerland in mixed doubles at the Summer Youth Olympics in Nanjing.
Her breakthrough as a senior player came in May 2019 when she won her first WTA Tour title in Prague. In July of that year, she won another WTA tournament, after making her first top-10 win over Kiki Bertens. She continued progressing, in March 2021 reaching the semifinals of the WTA 1000 Dubai Championships. With these performances she entered the top 50. Later that year, she reached the final of the Cincinnati Open, a WTA 1000 event, defeating Naomi Osaka, Belinda Bencic, and Karolína Plíšková, before falling to world No. 1, Ashleigh Barty.
Personal life and background Jil Teichmann was born on 15 July 1997 to mother Regula and father Jacques. She was born and raised in Barcelona, but her parents are from Zürich. Despite being born in Barcelona, Teichmann does not have a Spanish passport. In her youth, she tried various sports but then decided to play tennis on the professional level. She speaks five different languages: German, Spanish, English, French, and Catalan.
Juniors Teichmann is former junior world No. 3 player. She made her debut on the ITF Junior Circuit in February 2011 at the Grade-4 Swiss Junior Trophy, where she reached the final in doubles. In September 2011, she won her first junior title at the Grade-5 Luzern Junior Competition in singles. In October 2012, she reached the quarterfinals of the Grade A Osaka Mayor's Cup in singles. She won her first doubles title at the Swiss Junior Trophy in February 2013. At her major debut at the 2014 Australian Open, she reached the quarterfinals in doubles. In March 2014, she had success at the Grade-A Campeonato Internacional Juvenil de Tenis de Porto Alegre, winning titles in both singles and doubles.
She then continued with success, winning the title in doubles at the Grade-A Trofeo Bonfiglio, and reached the semifinals in singles. At the 2014 Wimbledon, she also reached the semifinals in doubles. In July 2014, she reached singles quarterfinals and doubles semifinals of the European Junior Championships. She then won the 2014 US Open girls' doubles title along with İpek Soylu, defeating Vera Lapko and Tereza Mihalíková in the final. At the 2015 French Open, she reached quarterfinals in singles and semifinals in doubles. She reached another doubles major quarterfinal in 2015 at Wimbledon and finished her junior career at the 2015 European Junior Championships, where she reached final in singles. As a junior, she won one singles and eight doubles titles in total.
At the 2014 Summer Youth Olympics in China, she won the gold medal in mixed doubles, partnering Jan Zieliński. They defeated Ye Qiuyu of China and Jumpei Yamasaki of Japan in the final.
Professional 2013–2018: First steps
Teichmann made her debut at the ITF Women's Circuit at the 10k event in Kreuzlingen in February 2013. In June of the same year, she reached her first ITF Circuit semifinal at the Bredeney Ladies Open. Year later, she reached another semifinal, this time at the 25k event in Lenzerheide. In October 2014, she reached her first ITF Circuit final, but lost to Polina Leykina at the 10k event in Sharm El Sheikh. In August 2015, she won her first ITF title at the 15k event in Braunschweig, defeating Ekaterina Alexandrova in the final. In May 2016, she made her WTA Tour debut, playing at the Internationaux de Strasbourg, where she also recorded her first tour match win, defeating Kurumi Nara in the first round. At the 2016 US Open, she made her debut at a major in qualifying, but failed to reach main draw. In May 2017, she finished runner-up at the 100k Open de Cagnes-sur-Mer, losing to Beatriz Haddad Maia in the final. In September, she reached second round of the Premier 5 Wuhan Open, that was her first appearance on that level. At the 2018 US Open, she made her Grand Slam main-draw debut and also recorded her first win on that level.
2019–2020: Two WTA Tour singles titles, top 100 Teichmann won her first WTA Tour singles title when she came through qualifying to win the Prague Open in May 2019, beating Karolína Muchová in the final. The win took her into the top 100 of the WTA rankings. In July, she reached quarterfinals of the Swiss Open, where she lost to Tamara Korpatsch. The following week, she won the Palermo Ladies Open, securing her first top-10 win with a victory over Kiki Bertens in the final. In August 2020, she reached another tour final, but lost to Jennifer Brady at the Lexington Challenger. In September, she reached the quarterfinals of the Internationaux de Strasbourg, where she lost to Elina Svitolina.
2021: WTA 1000 final, four top-10 wins At the Australian Open warm-up event Gippsland Trophy, she lost to Coco Gauff in the first round. Then, at the Australian Open, she was beaten again by Gauff. After these losses, she made progress by getting to the quarterfinals at the Phillip Island Trophy in Melbourne. She defeated three Romanian players in a row, Mihaela Buzărnescu, Monica Niculescu and Patricia Maria Țig, right before she faced a loss against Marie Bouzková.
The following week, Teichmann advanced to her first Premier-level semifinal at Adelaide. On her way, she defeated Kristina Mladenovic, Wang Qiang and Anastasija Sevastova. Eventual champion Iga Świątek prevailed in straight sets in the semifinals.
Her next step was the WTA 1000 event in Dubai. After defeating qualifier Katarina Zavatska in the first round, she upset top-10 player Petra Kvitová and reached her first WTA 1000 third round. She followed this up with a win over Ons Jabeur and then took her revenge against Gauff for the two consecutive losses that year. With the win she entered the semifinals where she faced Barbora Krejčíková, and lost in straight sets. As a result, she reached the top 50 at world No. 41, on 15 March 2021.
At her next tournament, the WTA 1000 Miami Open, she was forced to retire during her first-round match against Paula Badosa. However, she then came to the Madrid Open, starting with an upset over world No. 5, Svitolina, saving six match points. In the following round, she was eliminated by Badosa in three sets.
Ranked 76th at the WTA 1000 Cincinnati Open, Teichmann reached the final as a wildcard player, defeating en-route world No. 2 and second seed, Naomi Osaka, in the round of 16, tenth seed compatriot Belinda Bencic in the quarterfinals, and fifth seed Karolína Plíšková in the semifinals to make the biggest final in her career.
2022: Madrid semifinal, top 25 debut She reached her third career WTA 1000 semifinal at the Madrid Open, following four consecutive straight-set wins over Petra Kvitová, Leylah Fernandez, Elena Rybakina, and Anhelina Kalinina in the quarterfinals. Despite being ousted in the last four by Jessica Pegula, Teichmann entered the top 30 at world No. 29 for the first time following the tournament.
At the Italian Open, she recorded a back-to-back win against Elena Rybakina at the same level as the WTA 1000 Madrid to again reach the quarterfinals in an over three-hours marathon match. It was her 13th career top 20 win, with her 12th coming one day previously over Karolína Plíšková. Teichmann retired due to injury in her last eight match against Daria Kasatkina, but as a result, she secured her top 25 debut at world No. 24, on 16 May 2022.
At the French Open, she had reached the third round, after defeating Olga Danilović in straight sets, for the first time in her career in the eleventh attempt. She went one step further to the fourth round, having never got past the second at a major before, defeating Victoria Azarenka in a three set match lasting three hours and 18 minutes, the longest match thus far. This was her seventh of 14 top-20 wins in 2022. Her run was ended by Sloane Stephens.
Seeded 18th at Wimbledon, Teichmann lost in the first round to Ajla Tomljanović, in straight sets.
2023–2024: Indian Wells third round, second WTA Tour doubles title In March 2023, Teichmann reached the third round in Indian Wells for the first time defeating ninth seed Belinda Bencic in round two, before losing to Rebecca Peterson.
She captured her second WTA Tour doubles title with Jodie Burrage at the 2023 Transylvania Open.
Teichmann won her first WTA 125 title at the 2024 Ljubljana Open defeating Nuria Párrizas Díaz in the final. She also reached the final of this tournament in doubles, partnering Lina Gjorcheska, but they lost to Nuria Brancaccio and Leyre Romero Gormaz.
2025: Iași final Teichmann qualified for the main draw at the Singapore Open and defeated Harriet Dart and Olivia Gadecki to reach the quarterfinals, where she lost to fourth seed Wang Xinyu in three sets.
She won her second WTA 125 title at the Mumbai Open, defeating Mananchaya Sawangkaew in straight sets in the final. Teichmann moved up 17 places to world No. 100 in the rankings following her win on 10 February 2025.
Seeded sixth at the Iași Open, Teichmann defeated wildcard entrant Miriam Bulgaru, Maja Chwalińska, Simona Waltert and Sorana Cîrstea to make it into the final, which she lost to seventh seed Irina-Camelia Begu.
2026: French Open fourth round At the Morocco Open, she recorded wins over Julia Grabher, eighth seed Alycia Parks and wildcard entrant Yasmine Kabbaj to reach the semifinals, where she lost to sixth seed Petra Marčinko.
Teichmann recorded wins over 20th seed Liudmila Samsonova, Magdalena Fręch and 10th seed Karolína Muchová to make it through to the fourth round of the French Open, where her run was ended by eighth seed Mirra Andreeva.
Performance timelines
Only main-draw results are included in win–loss records.
Singles Current through the 2026 Wimbledon Championships. Tournament20162017201820192020202120222023202420252026Win %Grand Slam tournaments Australian OpenAQ1Q1Q11R1R2R2RQ2Q3A0 / 42–4 French OpenAQ3Q1Q11RA4R1RQ32R4R0 / 57–5 WimbledonAAA1RNH1R1R1RQ11RQ20 / 50–5 US OpenQ1Q12R1R1R2R1RQ1Q21RA0 / 62–6Win–loss0–00–01–10–20–31–34–41–30–01–33–10 / 2011–20National representation Billie Jean King CupAA1RAFWRRQRQR1 / 45–3WTA 1000Dubai / Qatar OpenAAAA1RSF3R1RAAA0 / 46–4Indian Wells OpenAAQ2ANH2R1R3RAQ1A0 / 32–3Miami OpenAAAANH1R1R1RAAA0 / 30–3Madrid OpenAAAANH2RSF2RAQ2A0 / 35–3Italian OpenAAAA1R1RQF2RA2RQ20 / 53–5Canadian OpenAAAANH1R3RAAAA0 / 22–2Cincinnati OpenAAAQ12RF1RAAAA0 / 36–3Guadalajara OpenNH1RANMS0 / 10–1Wuhan OpenA2RQ1Q1NHAA0 / 11–1China OpenAQ1A1RNHAAA0 / 10–1Win–loss0–01–10–00–11–310–711–82–50–00–00 / 2525–25Career statistics20162017201820192020202120222023202420252026Win %Tournaments136121220211622Career total: 93Titles0002000000Career total: 2Finals0002110000Career total: 4Hard win–loss0–01–13–40–79–821–1410–146–81–12–10 / 5753–58Clay win–loss1–10–20–212–22–33–511–42–61–10–12 / 3032–27Grass win–loss0–00–00–00–10–00–10–31–30–00–10 / 91–9Overall win–loss1–11–33–612–1011–1124–2021–219–172–22–32 / 9686–94Win (%)Career total: Year–end ranking22114214471573735143137126$3,460,993
Doubles Current through the 2023 Guadalajara Open.