Stadium: Court 20 Round: 27 Ground: Clay
| ITF W15 Hilton Head | 2021/10/09 13:00 | Wiersholm, Katja v Ruckno, Emily | 6-0,6-0 |
| ITF W15 Hilton Head | 2021/10/07 14:20 | Kissell, Joelle v Wiersholm, Katja | 5-7,4-6 |
| ITF W15 Hilton Head | 2021/10/07 13:00 | Kissell, Joelle v Wiersholm, Katja | 5-7,4-5 |
| ITF - W15 Monastir | 2021/07/28 09:55 | Wiersholm, Katja v Katarina Kozarov | 1-6,2-6 |
| ITF - W15 Monastir | 2021/07/27 09:00 | Pielet, Gianna v Wiersholm, Katja | 1-6,3-6 |
| ITF - W15 Monastir | 2021/07/26 10:30 | Margaux Komano v Wiersholm, Katja | 3-6,5-7 |
| ITF - W15 Monastir | 2021/07/23 10:35 | Dalayna Hewitt v Wiersholm, Katja | 6-4,6-2 |
| ITF - W15 Monastir | 2021/07/22 11:40 | Wiersholm, Katja v Alice Gillan | 6-2,6-2 |
| 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 | Orpana, Oona 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 Jani, Reka-Luca | 1-6,6-4,6-7 |
| ITF W25 Radom | 2021/08/11 11:00 | Olyanovskaya, Valeriya v Ania Hertel | 6-7,2-6 |
| ITF W25 Bydgoszcz | 2021/08/02 13:10 | Dagan Fruchtman, Mika v Ania Hertel | 6-7,6-4,10-8 |