| 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 | 2021/05/07 07:00 | Gebriela Mihaylova v Katerina Dimitrova | 6-4,5-7,5-7 |
| ITF W15 Sozopol | 2021/10/14 12:30 | Nastja Kolar v Katerina Dimitrova | 6-1,6-0 |
| 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 |
| ITF W15 Sozopol | 2021/10/14 15:00 | Oceane Babel v Gebriela Mihaylova | 6-4,6-3 |
| ITF W15 Sozopol | 2021/10/13 09:00 | Vanessa I G Popa Teiusanu v Gebriela Mihaylova | 0-6,6-7 |
| ITF W15 Sozopol | 2021/10/06 08:00 | Gebriela Mihaylova v Ani Vangelova | 3-6,3-6 |
| ITF W15 Sozopol | 2021/09/14 09:00 | Denislava Glushkova v Gebriela Mihaylova | 6-1,6-3 |
| ITF W15 Varna | 2021/09/09 10:25 | Martha Matoula v Gebriela Mihaylova | 6-3,6-1 |
| ITF W15 Varna | 2021/09/07 06:30 | Margarita Ignatjeva v Gebriela Mihaylova | 4-6,6-7 |
| ITF W15 Prokuplje | 2021/07/06 07:00 | Karola Patricia Bejenaru v Gebriela Mihaylova | 6-4,6-1 |
| ITF W15 Prokuplje | 2021/07/04 07:00 | Graziella Barrett v Gebriela Mihaylova | 0-6,0-6 |