| ITF - Mosquera W35 | 04/25 14:20 | 27 | [321] Katarina Kozarov v Nicole Fossa Huergo [267] | Retired | |
| ITF - Mosquera W35 | 04/24 16:55 | 26 | Katarina Kozarov v Valentina Mediorreal Arias | 6-0,6-1 | |
| ITF - Mosquera W35 | 04/23 20:30 | 25 | Katarina Kozarov v Jimar G G Gonzalez | 6-2,6-0 | |
| WTA Bogota | 03/30 15:00 | 14 | [323] Katarina Kozarov v Harmony Tan [221] | 0-6,0-6 | |
| ITF - Solarino W35 | 03/13 11:30 | 25 | Weronika Falkowska v Katarina Kozarov | Cancelled | |
| ITF - Solarino W35 | 03/05 12:00 | 25 | [262] Lesley P Kerkhove v Katarina Kozarov [322] | 6-2,6-2 | |
| ITF - Helsinki W35 | 02/28 09:50 | 25 | [321] Katarina Kozarov v Julia Middendorf [373] | 2-6,4-6 | |
| ITF - Wesley Chapel W35 | 02/09 15:00 | 27 | [319] Katarina Kozarov v Leonie Kung [377] | Retired | |
| ITF - Wesley Chapel W35 | 02/08 13:50 | 26 | [319] Katarina Kozarov v Kayla Cross [249] | 6-2,4-6,6-3 | |
| ITF - Wesley Chapel W35 | 02/06 17:30 | 25 | Katarina Kozarov v Jada Bui | 3-6,6-1,6-1 | |
| ITF W35 Le Gosier | 01/27 21:00 | 28 | Clara Vlasselaer v Katarina Kozarov | 6-4,6-3 | |
| ITF W35 Le Gosier | 01/26 18:00 | 27 | Sina Herrmann v Katarina Kozarov | 4-6,6-3,4-6 | |
| ITF W35 Le Gosier | 01/25 19:00 | 26 | Antonia Schmidt v Katarina Kozarov | 1-6,5-7 | |
| ITF W35 Le Gosier | 01/24 14:45 | 25 | Isabelle Boulais v Katarina Kozarov | 6-1,4-6,1-6 | |
| ITF - Petit-Bourg W35 | 01/18 15:25 | 26 | Ashton Bowers v Katarina Kozarov | Retired | |
| ITF - Petit-Bourg W35 | 01/16 22:25 | 25 | Vicky Van De Peer v Katarina Kozarov | Retired | |
| ITF - Nonthaburi W50 | 01/09 05:30 | 25 | [242] Dalila Jakupovic v Katarina Kozarov [324] | 6-4,6-2 | |
| ITF - Nonthaburi W50 | 01/03 03:00 | 25 | Katarina Kozarov v Patcharin Cheapchandej | 6-4,1-6,6-7 | |
| ITF - Selva Gardena W25 | 11/29 11:25 | 26 | Katarina Kozarov v Kamilla Bartone | 6-2,4-6,6-7 | |
| ITF - Selva Gardena W25 | 11/28 10:30 | 25 | Katarina Kozarov v Elisabeth Junge-Ilges | 6-3,6-2 | |
| ITF - Ortisei W25 | 11/22 09:00 | 26 | [473] Carolina Kuhl v Katarina Kozarov [307] | 4-6,6-3,6-4 | |
| ITF - Ortisei W25 | 11/21 11:30 | 25 | Lara Pfeifer v Katarina Kozarov | 3-6,7-6,3-6 | |
| ITF - Petange W40 | 11/15 08:50 | 25 | [299] Magali Kempen v Katarina Kozarov [307] | 3-6,6-4,6-4 | |
| WTA Tampico | 10/27 01:10 | 26 | [313] Katarina Kozarov v Kamilla Rakhimova [89] | 6-2,2-6,5-7 | |
| WTA Tampico | 10/24 21:50 | 25 | [313] Katarina Kozarov v Carole Monnet [181] | 6-2,6-3 | |
| ITF - Saguenay W60 | 10/18 16:45 | 26 | [315] Katarina Kozarov v Robin Anderson [359] | 3-6,7-6,0-6 | |
| ITF - Saguenay W60 | 10/17 15:30 | 25 | Paris Corley v Katarina Kozarov | 4-6,4-6 | |
| ITF - Florence W25 | 10/11 16:00 | 25 | Iva Jovic v Katarina Kozarov | 6-1,6-4 | |
| ITF - Rome, GA W60 | 10/03 17:45 | 25 | [274] Jamie Loeb v Katarina Kozarov [312] | 6-4,7-5 | |
| ITF - Ceuta W25 | 09/24 08:00 | 29 | [345] Katarina Kozarov v Aliona Falei [340] | 1-6,4-6 |