Stadium: Court 1 Round: 25 Ground: Clay
| ITF W25 Altenkirchen | 2020/02/25 11:30 | Marina Melnikova v Zaja, Anna | 4-6,3-6 |
| ITF W25 Marbella | 2021/09/05 09:55 | Marina Melnikova v Sohyun Park | 1-6,6-7 |
| ITF W25 Marbella | 2021/09/04 08:55 | Marina Melnikova v Anna Kubareva | 4-6,6-2,6-3 |
| ITF W25 Marbella | 2021/09/03 09:00 | Marina Melnikova v Leyre Romero Gormaz | 6-1,0-6,6-4 |
| ITF W25 Marbella | 2021/09/02 10:10 | Marina Melnikova v Ekaterina Shalimova | 6-0,6-2 |
| ITF W25 Marbella | 2021/09/01 10:05 | Marina Melnikova v Tatiana Pieri | 7-5,7-5 |
| US Open Women | 2021/08/26 15:00 | Marina Melnikova v Harmony Tan | 1-6,1-6 |
| US Open Women | 2021/08/24 15:00 | Minella, Mandy v Marina Melnikova | 3-6,6-7 |
| WTA - Cluj-Napoca | 2021/08/02 08:30 | Kaja Juvan v Marina Melnikova | 6-1,6-1 |
| WTA Karlsruhe | 2021/09/07 08:00 | Gatto-Monticone, Giulia v Zaja, Anna | 1-6,6-4,6-3 |
| ITF W60 Prerov | 2021/08/25 07:55 | Nikola Bartunkova v Zaja, Anna | 6-3,6-4 |
| 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 |