Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Takasaki | 2023/09/20 01:00 | Naoki Nakagawa v Seita Watanabe | 6-3,6-2 |
| ITF M25 Takasaki | 2023/09/18 03:30 | Mitsuki Wei Kang Leong v Seita Watanabe | 4-6,4-6 |
| Sapporo, Singles Main, M-ITF-JPN-02A | 2023/09/15 00:55 | Naoki Nakagawa v Seita Watanabe | 6-3,6-2 |
| Sapporo, Singles Main, M-ITF-JPN-02A | 2023/09/13 03:00 | Seita Watanabe v Yuta Kikuchi | 6-1,6-3 |
| Sapporo, Singles Main, M-ITF-JPN-02A | 2023/09/06 03:35 | Seita Watanabe v Tatsuma Ito | 6-4,4-6,4-6 |
| ITF M25 Tainan | 2023/08/23 04:20 | Ergi Kirkin v Seita Watanabe | 4-6,7-6,6-3 |
| 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 Sharm El Sheikh | 2023/11/09 08:00 | Louis Wessels v Asrawy, Amr | 7-6,4-6,3-6 |
| ITF - M25 Sharm El Sheikh | 2023/11/08 08:00 | Louis Wessels v Dimic, Matic | 6-3,6-4 |
| Challenger Ismaning | 2023/10/31 10:00 | Andrew Paulson v Louis Wessels | 6-4,6-7,6-3 |
| Challenger Ismaning | 2023/10/30 14:00 | Marius Copil v Louis Wessels | 6-3,4-6,3-6 |
| Challenger Ismaning | 2023/10/29 17:20 | Hazem Naw v Louis Wessels | 6-4,6-7,5-7 |
| Challenger Ortisei | 2023/10/25 08:00 | Luca Giacomini v Louis Wessels | 6-3,6-4 |
| Challenger - Hambourg | 2023/10/15 11:45 | Louis Wessels v Akira Santillan | 1-6,2-6 |
| ITF M25 Sabadell | 2023/09/27 12:05 | Louis Wessels v Felix Gill | 0-6,3-6 |