Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF W15 Sozopol | 2021/10/13 12:25 | Nastja Kolar v Laia Petretic | 6-1,6-4 |
| ITF W15 Sozopol | 2021/10/07 10:40 | Nastja Kolar v Anna Brogan | 2-6,2-6 |
| ITF W15 Sozopol | 2021/10/05 09:00 | Nastja Kolar v Yoana Moneva | 6-0,6-1 |
| UTR Pro Tennis Series Zadar Women | 2021/10/02 07:00 | Zuzana Zlochova v Nastja Kolar | 3-6,6-4,6-4 |
| UTR Pro Tennis Series Zadar Women | 2021/10/01 12:30 | Ema Bolebruchova v Nastja Kolar | 2-6,1-6 |
| UTR Pro Tennis Series Zadar Women | 2021/09/30 08:00 | Victoria Chramcova v Nastja Kolar | 0-6,0-6 |
| UTR Pro Tennis Series Zadar Women | 2021/09/28 08:30 | Bojana Marinkovic v Nastja Kolar | 2-6,6-4,6-4 |
| UTR Pro Tennis Series Zadar Women | 2021/09/27 15:30 | Nastja Kolar v Matea Mamic | 2-6,6-1,5-2 |
| ITF W15 Sozopol | 2021/10/13 09:00 | Nicole Gadient v Katerina Dimitrova | 3-6,3-6 |
| ITF W15 Sozopol | 2021/10/07 08:00 | Katerina Dimitrova v Oana Gavrila | 4-6,6-4,2-6 |
| ITF W15 Sozopol | 2021/10/05 10:00 | Katerina Dimitrova v Michaela Laki | 4-6,7-6,6-4 |
| ITF W15 Sozopol | 2021/09/15 08:00 | Katerina Dimitrova v Anna Ozerova | 2-6,4-6 |
| ITF W15 Varna | 2021/09/10 08:30 | Elena-Teodora Cadar v Katerina Dimitrova | 6-1,4-6,2-6 |
| ITF W15 Varna | 2021/09/08 12:15 | Mihaela Tsoneva v Katerina Dimitrova | 2-6,4-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/16 08:30 | Katerina Dimitrova v Gebriela Mihaylova | 6-2,5-1 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/15 09:00 | Katerina Dimitrova v Ralitsa Alexandrova | 6-0,2-6,6-1 |