Stadium: Center Court Round: 54 Ground: Hardcourt outdoor
| 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 |
| ITF M15 Monastir | 2023/07/16 08:00 | Seita Watanabe v Alberto Bronzetti | 6-2,6-3 |
| ITF M15 Monastir | 2023/07/12 09:25 | Seita Watanabe v Cyril Vandermeersch | 5-7,3-6 |
| ITF M25 Santo Domingo | 2023/06/27 15:30 | Bernard Tomic v Seita Watanabe | 6-4,6-3 |
| ITF M15 Santo Domingo | 2023/06/21 13:30 | Tauheed Browning v Seita Watanabe | 7-6,0-6,7-5 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Jumpei Yamasaki v Seita Watanabe | 6-4,6-4 |
| Challenger Astana | 2023/07/23 09:45 | Vitaliy Zatsepin v Egor Gerasimov | 3-6,2-6 |
| ITF M15 Aktobe | 2023/03/06 08:20 | Aliaksandr Liaonenka v Vitaliy Zatsepin | 6-3,6-2 |
| ITF M15 Aktobe | 2023/02/27 07:45 | Shohei Chikami v Vitaliy Zatsepin | 6-1,4-6,10-5 |
| ITF M15 Šymkent | 2021/04/12 04:00 | Vitaliy Zatsepin v Ivan Denisov | 2-6,2-6 |