Stadium: Court 6 Round: 25 Ground: Clay
| ITF W60 Prerov | 2021/08/24 08:00 | Nikola Bartunkova v Anastasiya Konstantinovna Soboleva | 6-3,6-2 |
| ITF W60 Prerov | 2021/08/23 08:00 | Zlochova, Zuzana v Nikola Bartunkova | 1-6,5-7 |
| ITF W60 Prerov | 2021/08/22 08:00 | Nikola Bartunkova v Drahota Szabo, Dorka | 6-2,6-2 |
| ITF W60 Olomouc | 2021/07/20 12:55 | Panna Udvardy v Nikola Bartunkova | 6-0,6-2 |
| ITF W60 Stare Splavy | 2021/06/17 11:10 | Nikola Bartunkova v Cadantu, Alexandra | 6-7,1-6 |
| ITF W60 Stare Splavy | 2021/06/16 12:50 | Rebecca Sramkova v Nikola Bartunkova | 6-1,3-6,4-6 |
| ITF W25 Prague | 2021/05/05 09:35 | Nikola Bartunkova v Cagla Buyukakcay | 4-6,5-7 |
| WTA Istanbul | 2021/04/18 10:40 | Nikola Bartunkova v Anastasia Gasanova | 4-6,7-5,3-6 |
| ITF W60 San Bartolome De Tirajana | 2021/08/18 13:10 | Ashley Lahey v Zaja, Anna | 7-6,7-6 |
| ITF W60 Versmold | 2021/07/30 15:25 | Zaja, Anna v Ferrando, Cristiana | 1-6,3-6 |
| ITF W60 Versmold | 2021/07/29 15:30 | Hogenkamp, Richel v Zaja, Anna | 6-7,2-6 |
| ITF W60 Versmold | 2021/07/28 16:35 | Zaja, Anna v Sofia Shapatava | 6-1,3-6,6-1 |
| ITF W60 Olomouc | 2021/07/23 08:00 | Panna Udvardy v Zaja, Anna | 6-2,6-2 |
| ITF W60 Olomouc | 2021/07/22 10:45 | Zaja, Anna v Simona Waltert | 7-6,6-1 |
| ITF W60 Olomouc | 2021/07/20 11:45 | Zaja, Anna v Kolodziejova, Miriam | 7-5,7-5 |
| WTA Hamburg | 2021/07/08 14:15 | Zaja, Anna v Elena-Gabriela Ruse | 2-6,2-6 |