| UTR Pro Tennis Series Plovdiv Women | 2021/12/16 09:00 | Ekaterina Vl. Makarova v Nastja Kolar | 6-3,6-4 |
| UTR Pro Tennis Series Plovdiv Women | 2021/12/14 07:30 | Gabriela Duca v Nastja Kolar | 6-3,1-6,5-7 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/11 12:30 | Darja Semenistaja v Nastja Kolar | 0-6,7-5,7-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/10 11:00 | Nastja Kolar v Silvia Martinez Jimenez | 6-2,6-2 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/09 11:00 | Nastja Kolar v Kristyna Hrabalova | 6-1,6-4 |
| UTR Pro Tennis Series Barcelona Women | 2021/12/08 10:30 | Ivonne Cavalle-Reimers v Nastja Kolar | 4-6,6-4,6-2 |
| UTR Pro Tennis Series Zadar Women | 2021/11/29 12:30 | Nastja Kolar v Victoria Borodulina | 6-2,6-2 |
| UTR Pro Tennis Series Zadar Women | 2021/11/29 09:51 | Nastja Kolar v Andjela Lopicic | 6-0,6-3 |