Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 - Tainan | 2023/08/20 02:00 | Ergi Kirkin v Makoto Ochi | 6-0,6-2 |
| ITF M25 - Tainan | 2023/08/19 01:55 | Ergi Kirkin v Tsung-Hao Huang | 6-3,6-0 |
| ITF M25 - Tainan | 2023/08/18 02:00 | Ergi Kirkin v Bang Shuo Yin | 7-6,7-5 |
| ITF M25 - Tainan | 2023/08/17 02:00 | Ergi Kirkin v Naoki Tajima | 6-3,6-4 |
| ITF M25 - Tainan | 2023/08/16 02:00 | Ergi Kirkin v Issei Okamura | 6-0,6-2 |
| Challenger Meerbusch | 2023/08/10 13:05 | Ergi Kirkin v Camilo Ugo Carabelli | 1-6,4-6 |
| Challenger Meerbusch | 2023/08/09 09:55 | Ergi Kirkin v Rudolf Molleker | 6-4,7-6 |
| Challenger Meerbusch | 2023/08/07 15:00 | Ergi Kirkin v John Sperle | 7-6,6-3 |
| ITF M25 - Tainan | 2023/08/15 02:00 | Seita Watanabe v Takuya Kumasaka | 3-6,6-4,2-6 |
| ITF M25 - Astana | 2023/08/03 10:50 | Khumoyun Sultanov v Seita Watanabe | 4-6,6-3,7-5 |
| ITF M25 - Astana | 2023/08/02 10:25 | Seita Watanabe v Timur Maulenov | 3-6,6-3,6-2 |
| ITF M25 - Astana | 2023/08/01 05:20 | Seita Watanabe v Mykhailo Mossur | 6-4,6-3 |
| ITF M25 - Astana | 2023/07/31 05:40 | Seita Watanabe v Vitaliy Zatsepin | 6-2,6-2 |
| Challenger Astana | 2023/07/23 10:35 | Seita Watanabe v Egor Agafonov | 2-6,2-6 |
| ITF - M15 - Monastir | 2023/07/19 14:20 | Seita Watanabe v Gilbert S K Junior | 2-6,6-2,2-6 |
| ITF - M15 - Monastir | 2023/07/17 15:00 | Seita Watanabe v Vyacheslav Ovchinnikov | 6-2,6-2 |