Stadium: Court 2 Round: 26 Ground: Clay
| ITF W25 Liepaja | 2021/05/26 09:25 | Valentyna Ivakhnenko v Anna Zaja | 2-6,3-6 |
| ITF W15 Sibenik | 2021/05/19 14:15 | Oleksandra Oliynykova v Anna Zaja | 4-6,6-3,6-3 |
| WTA Stuttgart | 2021/04/17 16:00 | Stefanie Voegele v Anna Zaja | 6-1,6-3 |
| ITF W60 Oeiras | 2021/04/12 09:55 | Stephanie Wagner v Anna Zaja | 6-3,6-2 |
| ITF W60 Oeiras | 2021/04/11 11:25 | Olga Parres Azcoitia v Anna Zaja | 3-6,2-6 |
| ITF W60 Bellinzona | 2021/04/05 09:40 | Anna Zaja v Lina Gjorcheska | 5-7,2-6 |
| ITF W60 Bellinzona | 2021/04/04 13:30 | Anna Danilina v Anna Zaja | 4-6,2-6 |
| ITF W25 Manacor | 2021/03/02 09:50 | Anna Zaja v Oksana Selekhmeteva | 2-6,2-6 |
| ITF W25 Liepaja | 2021/05/27 09:55 | Dea Herdzelas v Maileen Nuudi | 3-6,3-6 |
| ITF W25 Liepaja | 2021/05/25 09:35 | Maileen Nuudi v Iveta Dapkute | 6-2,6-1 |
| ITF W25 Liepaja | 2021/05/24 09:15 | Viktoriia Dema v Maileen Nuudi | 1-6,5-7 |
| ITF W15 Antalya | 2021/05/02 06:00 | Maileen Nuudi v Eszter Meri | 1-6,1-6 |
| ITF W15 Antalya | 2021/04/26 09:00 | Daria Krasnova v Maileen Nuudi | 6-2,6-0 |
| ITF W15 Antalya | 2021/04/25 07:00 | Sara Mikaca v Maileen Nuudi | 2-6,0-6 |
| ITF W15 Antalya | 2021/03/22 07:00 | Dorka Drahota Szabo v Maileen Nuudi | 5-7,6-4,10-8 |
| ITF W15 Antalya | 2021/03/21 07:00 | Ralitsa Alexandrova v Maileen Nuudi | 1-6,4-6 |