| Billie Jean King Cup | 11/06 15:00 | 29 | [28] Daria Kasatkina v Jil Teichmann [39] | 6-2,6-4 | |
| Billie Jean King Cup | 11/05 16:50 | 28 | [131] Storm Sanders v Jil Teichmann [39] | 0-6,3-6 | |
| WTA Cluj-Napoca | 10/25 09:00 | 25 | [146] Anastasia Gasanova v Jil Teichmann [39] | 4-6,6-0,7-5 | |
| WTA Indian Wells | 10/08 20:45 | 24 | [61] Irina-Camelia Begu v Jil Teichmann [39] | 7-5,6-1 | |
| WTA - Chicago | 09/30 17:15 | 26 | [38] Jil Teichmann v Marketa Vondrousova [41] | 4-6,3-6 | |
| WTA - Chicago | 09/29 16:15 | 25 | [38] Jil Teichmann v Magda Linette [54] | 6-2,6-4 | |
| WTA - Chicago | 09/28 14:00 | 24 | [38] Jil Teichmann v Kaia Kanepi [66] | 7-6,7-5 | |
| WTA Ostrava | 09/24 16:00 | 27 | [42] Jil Teichmann v Petra Kvitova [10] | 4-6,4-6 | |
| WTA Ostrava | 09/23 18:00 | 26 | [42] Jil Teichmann v Alison Riske [32] | 6-3,1-6,6-4 | |
| WTA Ostrava | 09/21 19:00 | 25 | [15] Angelique Kerber v Jil Teichmann [42] | 2-6,3-6 | |
| US Open - Kvinner | 09/02 16:00 | 24 | [28] Anett Kontaveit v Jil Teichmann [44] | 6-4,6-1 | |
| US Open - Kvinner | 08/31 22:35 | 23 | [161] Cristina Bucsa v Jil Teichmann [44] | 3-6,4-6 | |
| WTA Cleveland | 08/23 14:00 | 25 | Anna Blinkova v Jil Teichmann | Cancelled | |
| WTA Cincinnati | 08/22 18:00 | 29 | [1] Ashleigh Barty v Jil Teichmann [76] | 6-3,6-1 | |
| WTA Cincinnati | 08/21 19:40 | 28 | [4] Karolina Pliskova v Jil Teichmann [76] | 2-6,4-6 | |
| WTA Cincinnati | 08/20 23:00 | 27 | [12] Belinda Bencic v Jil Teichmann [76] | 3-6,2-6 | |
| WTA Cincinnati | 08/19 23:00 | 26 | [76] Jil Teichmann v Naomi Osaka [2] | 3-6,6-3,6-3 | |
| WTA Cincinnati | 08/18 17:00 | 25 | [83] Bernarda Pera v Jil Teichmann [65] | 1-6,4-6 | |
| WTA Cincinnati | 08/16 17:30 | 24 | [65] Jil Teichmann v Sorana Cirstea [40] | 6-2,6-0 | |
| WTA Montreal | 08/10 22:45 | 24 | [28] Danielle Collins v Jil Teichmann [65] | 4-6,6-1,6-3 | |
| WTA Palermo | 07/21 14:00 | 26 | [137] Elena Gabriela Ruse v Jil Teichmann [55] | Walkover | |
| WTA Palermo | 07/19 16:40 | 25 | [291] Marina B Ribera v Jil Teichmann [55] | 6-3,4-6,1-6 | |
| WTA Lausanne | 07/14 13:00 | 25 | Jil Teichmann v Maryna Zanevska | 3-6,6-2,2-6 | |
| WTA Hamburg | 07/07 09:00 | 25 | [198] Elena Gabriela Ruse v Jil Teichmann [55] | 7-5,7-6 | |
| Wimbledon - Kvinner | 06/30 10:00 | 23 | [55] Jil Teichmann v Camila Giorgi [62] | 2-6,2-6 | |
| WTA Strasbourg | 05/26 11:15 | 26 | [43] Yulia Putintseva v Jil Teichmann [53] | Retired | |
| WTA Strasbourg | 05/24 10:15 | 25 | [77] Anna Blinkova v Jil Teichmann [53] | 2-6,3-6 | |
| WTA Roma | 05/10 08:00 | 24 | [47] Anastasija Sevastova v Jil Teichmann [54] | 3-6,6-1,6-3 | |
| WTA Madrid | 05/01 17:00 | 25 | [40] Jil Teichmann v Paula Badosa [62] | 7-5,1-6,2-6 | |
| WTA Madrid | 04/29 09:00 | 24 | [5] Elina Svitolina v Jil Teichmann [40] | 6-2,4-6,6-7 |
Wikipedia - Jil Teichmann
Jil Belén Teichmann (born 15 July 1997) is a Swiss professional tennis player. She has been ranked by the Women's Tennis Association (WTA) as high as world No. 21 in singles and No. 73 in doubles. She has won two titles in singles and two in doubles on the WTA Tour, along with one WTA 125 doubles title. In addition, she won six singles titles and five doubles titles on the ITF Circuit.
A former junior world No. 3, Teichmann won a Grand Slam title in the girls' doubles event 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 title 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.