Stadium: Court 2 Round: 44 Ground: Hardcourt outdoor
| ITF W80 Tyler | 2021/10/27 18:00 | Conny Perrin v Katarina Kozarov | 6-7,6-2,6-3 |
| ITF W80 Tyler | 2021/10/26 14:55 | Alexandra Osborne v Katarina Kozarov | 2-6,2-6 |
| ITF W80 Tyler | 2021/10/25 16:40 | Katarina Kozarov v Dalayna Hewitt | 6-3,6-7,10-8 |
| ITF W25 Florence | 2021/10/12 15:20 | Katarina Kozarov v Alana Smith | 6-3,1-6,8-10 |
| UTR Pro Tennis Series Florida Women | 2021/09/16 16:30 | Katarina Kozarov v Anais Gabriel | 6-4,5-1 |
| UTR Pro Tennis Series Florida Women | 2021/09/15 12:00 | Katarina Kozarov v Stephanie Kent | 6-3,6-1 |
| ITF W25 Vigo | 2021/08/25 14:30 | Alba Carrillo Marin v Katarina Kozarov | 7-6,6-1 |
| ITF W25 Vigo | 2021/08/24 09:55 | Sowjanya Bavisetti v Katarina Kozarov | 2-6,2-6 |