Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF W15 Villena | 2021/02/10 08:30 | Marthiens, Karen v Shiho Akita | 3-6,6-3,5-7 |
| ITF W15 Villena | 2021/02/09 08:30 | Krasnova, Daria v Marthiens, Karen | 6-3,4-6,8-10 |
| ITF W15 Villena | 2021/02/07 08:30 | Dury, Mathilde v Marthiens, Karen | 4-6,4-6 |
| ITF - W15 Monastir | 2021/01/12 09:00 | Yepifanova, Alexandra v Marthiens, Karen | 6-3,7-6 |
| ITF - W15 Monastir | 2021/01/11 09:30 | Chahd Berriri v Marthiens, Karen | 1-6,0-6 |
| ITF - W15 Monastir | 2021/01/08 08:25 | Gabriella Price v Marthiens, Karen | 6-0,6-4 |
| ITF - W15 Monastir | 2021/01/05 10:35 | Marthiens, Karen v Safarova, Zdena | 1-6,6-4,7-6 |
| ITF W15 Madrid | 2020/12/07 10:00 | Marthiens, Karen v Lucia Martinez | 6-1,5-7,8-10 |
| ITF W25 Altenkirchen | 2021/02/14 16:00 | Diana Marcinkevica v Tayisiya Morderger | 6-2,6-1 |
| German Championship Women | 2020/12/10 09:00 | Tayisiya Morderger v Noma Noha Akugue | 7-5,1-6,1-6 |
| ITF W25 Prerov | 2020/09/22 08:00 | Nina Potocnik v Tayisiya Morderger | 7-6,7-6 |
| Cagnes-Sur-Mer, Simples W-ITF-FRA-12A | 2020/09/13 14:55 | Ankita Raina v Tayisiya Morderger | 6-4,6-0 |
| German Masters Women | 2020/08/26 06:30 | Tayisiya Morderger v Klasen, Charlotte | 6-3,6-2 |
| German Masters Women | 2020/08/25 08:10 | Tayisiya Morderger v Ekaterina Makarova | 6-7,3-6 |
| German Masters Women | 2020/08/24 14:15 | Tayisiya Morderger v Valerie Karl | 6-1,6-1 |
| German Premier League Women | 2020/08/21 06:30 | Tayisiya Morderger v Basak Eraydin | 6-2,7-6 |