Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2023/07/17 15:00 | Seita Watanabe v Ovchinnikov, Vyacheslav | 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 |
| UTR Pro Miki | 2023/02/12 02:00 | Tomohiro Masabayashi v Seita Watanabe | 4-6,1-5 |
| UTR Pro Miki | 2023/02/11 03:30 | Yuichiro Inui v Seita Watanabe | 6-7,6-7 |
| ITF - M15 Monastir | 2023/07/17 15:00 | Soares Klier, Gilbert v Pablo Trochu | 6-1,6-0 |
| ITF - M15 Monastir | 2023/07/17 07:30 | Soares Klier, Gilbert v Youssef Labbene | 6-2,6-2 |
| ITF - M15 Monastir | 2023/07/16 08:00 | Soares Klier, Gilbert v Guilherme Meale | 6-0,6-1 |
| ITF - M15 Monastir | 2023/07/13 08:00 | Enzo Wallart v Soares Klier, Gilbert | 6-1,6-4 |
| ITF - M15 Monastir | 2023/07/12 13:25 | Soares Klier, Gilbert v Alexandre Reco | 7-5,6-3 |
| ITF - M15 Monastir | 2023/07/10 13:00 | Soares Klier, Gilbert v Saveliy Ivanov | 6-2,6-1 |
| ITF - M15 Monastir | 2023/07/10 08:30 | Soares Klier, Gilbert v Tomas Luis | 6-1,6-3 |
| ITF - M15 Monastir | 2023/07/09 09:30 | Soares Klier, Gilbert v Hugo Cardinaud | 6-4,6-7,10-4 |