Stadium: Court 8 Round: 19 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2021/07/22 10:20 | Ayumi Koshiishi v Katarina Kozarov | 6-2,6-1 |
| ITF W25 Toronto | 2023/02/28 15:00 | Olivia Lincer v Katarina Kozarov | 3-6,6-3,6-3 |
| ITF W25 Petit-Bourg | 2023/01/21 17:50 | Emma Lene v Katarina Kozarov | 7-6,6-2 |
| ITF W25 Petit-Bourg | 2023/01/20 17:05 | Sarah Iliev v Katarina Kozarov | 5-7,3-6 |
| ITF W25 Petit-Bourg | 2023/01/19 15:50 | Nehanda Thomias v Katarina Kozarov | 1-6,2-6 |
| ITF W25 Petit-Bourg | 2023/01/18 20:50 | Jaeda Daniel v Katarina Kozarov | 5-7,3-6 |
| ITF W25 Malibu | 2023/01/03 23:30 | Katarina Kozarov v Madison Sieg | 2-6,6-3,11-13 |
| ITF W25 Navi Mumbai | 2022/12/22 06:25 | Katarina Kozarov v Diana Marcinkevica | 4-6,6-2,4-6 |
| ITF W25 Navi Mumbai | 2022/12/20 10:25 | Sahaja Yamalapalli v Katarina Kozarov | 2-6,7-6,4-6 |
| ITF W15 Kuching | 2023/03/01 09:35 | Ayumi Koshiishi v Jo-Leen Saw | 6-2,6-0 |
| ITF W15 Kuala Lumpur | 2023/02/26 01:30 | Hanyu Guo v Ayumi Koshiishi | 6-4,6-3 |
| ITF W15 Kuala Lumpur | 2023/02/25 01:30 | Ayumi Koshiishi v Aunchisa Chanta | 6-4,7-5 |
| ITF W15 Kuala Lumpur | 2023/02/24 01:30 | Ayumi Koshiishi v Riko Sawayanagi | 6-3,7-6 |
| ITF W15 Kuala Lumpur | 2023/02/23 01:30 | Ayumi Koshiishi v Meiqi Guo | 6-3,6-1 |
| ITF W15 Ipoh | 2023/02/18 01:30 | Lanlana Tararudee v Ayumi Koshiishi | 6-4,7-5 |
| ITF W15 Ipoh | 2023/02/17 01:30 | Dabin Kim v Ayumi Koshiishi | 2-6,5-7 |
| ITF W15 Ipoh | 2023/02/16 03:55 | Sara Nayar v Ayumi Koshiishi | 4-6,3-6 |