Stadion: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Frauen - W25 - Loule | 2021/10/05 13:10 | Jessika Ponchet v Diana Marcinkevica | 7-5,6-3 |
| ITF Damen - W25 - Lissabon | 2021/09/27 14:00 | Diana Marcinkevica v Yvonne Cavalle-Reimers | 3-6,4-6 |
| ITF Damen - W80 - Wiesbaden | 2021/09/20 15:00 | Lina Gjorcheska v Diana Marcinkevica | 6-4,6-1 |
| ITF Damen - W80 - Wiesbaden | 2021/09/20 08:00 | Mara Guth v Diana Marcinkevica | 6-7,2-6 |
| ITF Damen - W60 - Montreux | 2021/09/08 09:15 | Diana Marcinkevica v Susan Bandecchi | 4-6,1-6 |
| ITF Damen - W60 - Collonge-Bellerive | 2021/09/01 10:40 | Diana Marcinkevica v Estelle Cascino | 4-6,4-6 |
| ITF Damen - W25 - Verbier | 2021/08/25 07:55 | Ekaterina Makarova v Diana Marcinkevica | 2-6,6-1,6-3 |
| ITF Damen - W25 - Radom | 2021/08/11 11:05 | Anastasia Zakharova v Diana Marcinkevica | 6-1,6-4 |
| ITF Damen - W25 - Lagos | 2021/10/12 09:30 | Weronika Falkowska v Emily Webley-Smith | 6-3,6-2 |
| ITF Damen - W25 - Lagos | 2021/10/11 09:30 | Weronika Falkowska v Beatrice Laura Pirtac | 6-0,6-0 |
| ITF Frauen - W25 - Loule | 2021/10/06 09:00 | Weronika Falkowska v Ganna Poznikhirenko | 3-6,1-6 |
| ITF Frauen - W25 - Loule | 2021/10/05 11:05 | Weronika Falkowska v Julia Payola | 6-3,6-4 |
| ITF Frauen - W25 - Loule | 2021/10/04 11:15 | Weronika Falkowska v Evgeniya Burdina | 6-1,7-5 |
| ITF Damen - W60 - Caldas da Rainha | 2021/09/14 12:05 | Maddison Inglis v Weronika Falkowska | 3-6,7-5,6-3 |
| ITF Damen - W60 - Caldas da Rainha | 2021/09/13 12:30 | Weronika Falkowska v Alicia Barnett | 7-6,6-4 |
| ITF Damen - W60 - Caldas da Rainha | 2021/09/12 12:00 | Weronika Falkowska v Milla Sequeira | 7-5,6-4 |