Stadium: Court 1 Round: 25 Ground: Clay
| ITF W60 Grodzisk Mazowiecki | 2021/07/28 08:00 | Diana Marcinkevica v Maria Lourdes Carle | 2-6,2-6 |
| ITF W25 Les Contamines | 2021/07/22 11:25 | Diana Marcinkevica v Emeline Dartron | 6-7,6-4,2-6 |
| ITF W25 Les Contamines | 2021/07/20 13:25 | Diana Marcinkevica v Orange, Margaux | 6-4,6-3 |
| ITF W25 Tarvisio | 2021/07/14 10:00 | Nina Potocnik v Diana Marcinkevica | 6-3,7-6 |
| ITF W25 Tarvisio | 2021/07/12 14:25 | Sofia Rocchetti v Diana Marcinkevica | 7-6,2-6,2-6 |
| ITF W60 Amstelveen | 2021/07/06 07:50 | Diana Marcinkevica v Andreea Prisacariu | 2-6,6-2,5-10 |
| ITF W60 Amstelveen | 2021/07/05 09:05 | Diana Marcinkevica v Noa Liauw A Fong | 6-2,6-3 |
| ITF W25 Wroclaw | 2021/07/02 11:50 | Diana Marcinkevica v Kolodziejova, Miriam | 4-6,5-7 |
| ITF W25 Bydgoszcz | 2021/08/03 08:00 | Hiroko Kuwata v Nastasja Schunk | 0-6,4-6 |
| ITF W25 Bydgoszcz | 2021/08/02 08:00 | Oczachowska, Julia v Nastasja Schunk | 0-6,1-6 |
| ITF W60 Versmold | 2021/07/27 15:50 | Nastasja Schunk v Arruabarrena, L. | 3-6,2-6 |
| WTA Bad Homburg | 2021/06/20 09:00 | Piter, Katarzyna v Nastasja Schunk | 7-6,2-6,7-6 |
| ITF W25 Denain | 2021/06/16 09:15 | Nastasja Schunk v Paula Ormaechea | 2-6,6-3,6-7 |
| ITF W25 Denain | 2021/06/15 10:05 | Nastasja Schunk v Sinja Kraus | 6-2,6-2 |
| ITF W25 Denain | 2021/06/14 10:10 | Sarah Rebecca Sekulic v Nastasja Schunk | 1-6,2-6 |
| ITF W25 Otocec | 2021/05/31 09:05 | Beatriz Haddad Maia v Nastasja Schunk | 6-4,6-4 |