Stadium: Court 3 Round: 28 Ground: Clay
| ITF W25 Perigueux | 2021/06/24 08:00 | Polina Leykina v Anna Siskova | 2-6,3-6 |
| ITF W25 Vrnjacka Banja | 2021/08/20 09:00 | Lina Gjorcheska v Anna Siskova | 3-6,1-6 |
| ITF W25 Vrnjacka Banja | 2021/08/19 12:45 | Anna Siskova v Pemra Ozgen | 7-6,6-4 |
| ITF W25 Vrnjacka Banja | 2021/08/18 12:10 | Anna Siskova v Martina Colmegna | 6-2,4-6,7-6 |
| ITF W25 Koksijde | 2021/08/10 08:00 | Anna Siskova v Valentyna Ivakhnenko | 6-4,3-6,0-6 |
| ITF W25 Parnu | 2021/08/08 10:25 | Kaia Kanepi v Anna Siskova | 7-5,6-4 |
| ITF W25 Parnu | 2021/08/07 08:55 | Oleksandra Oliynykova v Anna Siskova | 4-6,2-6 |
| ITF W25 Parnu | 2021/08/06 08:00 | Anna Siskova v Giulia Gatto Monticone | 6-3,0-6,6-3 |
| ITF W25 Parnu | 2021/08/05 08:30 | Anna Siskova v Nastja Kolar | 6-1,6-3 |
| ITF W25 Vrnjacka Banja | 2021/08/20 09:00 | Polina Leykina v Sandra Samir | 5-7,6-4,6-2 |
| ITF W25 Vrnjacka Banja | 2021/08/19 10:55 | Sofya Lansere v Polina Leykina | 6-7,4-6 |
| ITF W25 Vrnjacka Banja | 2021/08/18 15:00 | Aneta Laboutkova v Polina Leykina | 3-6,7-5,2-6 |
| ITF W15 Bratislava | 2021/08/11 11:00 | Amarissa K Toth v Polina Leykina | 6-3,6-0 |
| ITF W25 Telavi | 2021/07/20 06:00 | Marine Partaud v Polina Leykina | 2-6,6-2,6-1 |
| ITF W25 Telavi | 2021/07/13 06:30 | Polina Bakhmutkina v Polina Leykina | 6-3,6-3 |
| ITF W60 Montpellier | 2021/06/28 11:00 | Polina Leykina v Dalila Spiteri | 3-6,2-6 |
| ITF W60 Montpellier | 2021/06/27 11:45 | Polina Leykina v Jasmin Jebawy | 6-1,6-4 |