Stadium: Court 12 Round: 28 Ground: Clay
| ITF - W15 Hilton Head | 2021/10/09 17:00 | Katja Wiersholm v Ania Hertel | 2-6,1-6 |
| ITF - W15 Hilton Head | 2021/10/09 13:00 | Maria Aran T Garcia v Ania Hertel | 2-6,3-6 |
| ITF - W15 Hilton Head | 2021/10/07 19:15 | Alessandra Crump v Ania Hertel | 0-6,3-6 |
| ITF - W25 Fort Worth | 2021/09/22 15:30 | Oona Orpana v Ania Hertel | 6-7,6-4,7-5 |
| ITF - W25 Fort Worth | 2021/09/21 16:15 | Amy Zhu v Ania Hertel | 3-6,4-6 |
| ITF - W25 Fort Worth | 2021/09/20 14:00 | Louise Kwong v Ania Hertel | 3-6,3-6 |
| ITF - W25 Radom | 2021/08/12 11:25 | Ania Hertel v Reka-Luca Jani | 1-6,6-4,6-7 |
| ITF - W25 Radom | 2021/08/11 11:00 | Valeriya Olyanovskaya v Ania Hertel | 6-7,2-6 |
| ITF - W15 Hilton Head | 2021/10/09 16:15 | Deniza Marcinkevica v Katerina Stewart | 4-6,1-6 |
| ITF - W15 Hilton Head | 2021/10/09 13:00 | Mckenna Schaefbauer v Katerina Stewart | 0-6,6-4,3-10 |
| ITF - W15 Hilton Head | 2021/10/05 19:20 | Lena Lutzeier v Katerina Stewart | 1-6,1-6 |
| WTA - Cluj-Napoca | 2021/08/01 14:10 | Katerina Stewart v Irina Fetecau | 1-6,5-7 |
| ITF - W60 Versmold | 2021/07/28 11:00 | Katerina Stewart v Elina Avanesyan | 6-7,4-6 |
| ITF - W60 Biarritz | 2021/07/14 08:00 | Stephanie Wagner v Katerina Stewart | 6-0,6-1 |
| ITF - W60 Amstelveen | 2021/07/05 10:25 | Katerina Stewart v Alexandra Osborne | 4-6,1-6 |
| ITF - W60 Charleston | 2021/06/23 13:30 | Maria Mateas v Katerina Stewart | 6-4,0-6,7-6 |