| UTR Pro Tennis Series Pazardzhik Women | 2021/05/15 06:00 | Kolar, Nastja v Darja Semenistaja | 4-6,4-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/10 11:00 | Darja Semenistaja v Lucinda Gatsiounis | 6-2,5-1 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/09 12:30 | Darja Semenistaja v Morgina, Anna | 6-4,6-4 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/08 10:30 | Sebastianna Scilipoti v Darja Semenistaja | 6-2,6-3 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/07 14:30 | Elizabeth Jurna v Darja Semenistaja | 3-6,1-6 |
| ITF W15 Cancun | 2021/10/17 15:00 | Darja Semenistaja v Gailis, Rachel | 7-5,7-5 |
| ITF W15 Cancun | 2021/10/16 15:00 | Darja Semenistaja v Madison Sieg | 6-2,6-4 |
| ITF W15 Cancun | 2021/10/15 15:00 | Darja Semenistaja v Hina Inoue | 7-5,6-2 |
| ITF W15 Cancun | 2021/10/14 18:10 | Darja Semenistaja v Tchakarova, Eleonore | 6-2,6-2 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/10 11:00 | Kolar, Nastja v Martinez Jimenez, Silvia | 6-2,6-2 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/09 11:00 | Kolar, Nastja v Hrabalova, Kristyna | 6-1,6-4 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/08 10:30 | Ivonne Cavalle-Reimers v Kolar, Nastja | 4-6,6-4,6-2 |
| UTR Pro Tennis Series Zadar Women | 2021/11/29 12:30 | Kolar, Nastja v Victoria Borodulina | 6-2,6-2 |
| UTR Pro Tennis Series Zadar Women | 2021/11/29 09:51 | Kolar, Nastja v Lopicic, Andela | 6-0,6-3 |
| UTR Pro Tennis Series Zadar Women | 2021/11/27 08:00 | Kolar, Nastja v Chiara Jerolimov | 6-1,3-2 |
| UTR Pro Tennis Series Zadar Women | 2021/11/26 08:00 | Kolar, Nastja v Laura Svatikova | 5-7,6-1,4-6 |
| UTR Pro Tennis Series Zadar Women | 2021/11/24 13:30 | Gvozdenovic, Sara v Kolar, Nastja | 6-4,2-6,1-6 |