Stadium: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Al Zahra | 2023/11/01 11:30 | Ali Alshati v Issei Okamura | 3-6,1-6 |
| ITF - M25 Darwin | 2023/09/19 08:50 | Issei Okamura v Zak Talic | 6-7,6-3,3-6 |
| ITF - M25 Darwin | 2023/09/14 05:25 | Brandon Walkin v Issei Okamura | 6-7,6-2,6-3 |
| ITF - M25 Darwin | 2023/09/13 05:25 | Issei Okamura v Mason Naumovski | 6-4,4-6,6-4 |
| ITF - M25 Sapporo | 2023/09/07 02:40 | Sora Fukuda v Issei Okamura | 6-1,6-2 |
| ITF - M25 Sapporo | 2023/09/05 04:15 | Issei Okamura v Seiya Nakanishi | 6-1,6-1 |
| ITF - M25 Sapporo | 2023/09/04 00:55 | Issei Okamura v Shinnosuke Hiramatsu | 7-5,6-4 |
| ITF - M25 Tainan | 2023/08/16 02:00 | Ergi Kirkin v Issei Okamura | 6-0,6-2 |
| ITF - M15 Al Zahra | 2023/11/01 07:00 | Jannik Maute v Niklas Schell | 3-6,4-6 |
| ITF - M15 Al Zahra | 2023/10/26 07:00 | Mousa Alkotop v Niklas Schell | 4-6,7-5,7-6 |
| ITF - M15 Al Zahra | 2023/10/25 07:00 | Pablo Trochu v Niklas Schell | 4-6,2-6 |
| ITF - M25 Tavira | 2023/10/18 10:30 | Niklas Schell v Andrea Guerrieri | 3-6,2-6 |
| Challenger - Mouilleron le Captif | 2023/10/01 12:00 | Gabriel Debru v Niklas Schell | 6-4,6-1 |
| ITF - M15 Forbach | 2023/09/27 08:00 | Niklas Schell v Tom Gentzsch | 6-7,6-7 |
| ITF - M15 Monastir | 2023/09/13 12:10 | Aleksandr Lobanov v Niklas Schell | 4-6,7-6,6-2 |
| ITF - M15 Budapešť | 2023/08/29 12:00 | Niklas Schell v Giles Hussey | 4-6,3-6 |