Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF - Monastir M15 | 2021/08/01 09:00 | Seita Watanabe v Babji Siva Atturu | 6-1,6-0 |
| ITF - Monastir M15 | 2021/06/07 08:00 | Seita Watanabe v Ji Hoon Son | 1-6,6-1,6-10 |
| ITF - Monastir M15 | 2021/06/06 10:00 | Seita Watanabe v Connor Di Marco | 6-2,3-6,10-6 |
| ITF - Monastir M15 | 2021/05/31 09:00 | Seita Watanabe v Emil Reinberg | 6-7,5-7 |
| ITF - Monastir M15 | 2021/05/27 11:40 | Thomas Fancutt v Seita Watanabe | 7-6,4-6,6-2 |
| ITF - Monastir M15 | 2021/05/26 09:30 | Seita Watanabe v Mauro De Maio | 6-3,6-3 |
| ITF - Monastir M15 | 2021/05/24 12:30 | Savva Polukhin v Seita Watanabe | 6-7,2-6 |
| ITF - Monastir M15 | 2021/05/24 08:00 | Luka Vukovic v Seita Watanabe | 6-4,4-6,6-10 |
| ITF - Monastir M15 | 2021/07/26 08:00 | Mehdi Sadaoui v Credit Chaiyarin | 6-2,6-4 |
| ITF - Monastir M15 | 2021/07/25 09:00 | Credit Chaiyarin v Mikail Alimli | 6-3,7-5 |
| ITF - Monastir M15 | 2021/07/18 10:30 | Credit Chaiyarin v Adam Jones | 3-6,6-4,3-10 |
| ITF - Monastir M15 | 2021/07/12 14:30 | Evgeny Philippov v Credit Chaiyarin | 6-0,6-1 |
| ITF - Monastir M15 | 2021/07/12 08:00 | Credit Chaiyarin v Pavel Verbin | 6-3,6-2 |
| ITF - Monastir M15 | 2021/07/11 09:00 | Credit Chaiyarin v Wissam Abderrahman | 6-4,6-4 |
| ITF - Monastir M15 | 2021/07/04 09:00 | Kazuma Kawachi v Credit Chaiyarin | 6-3,6-2 |
| ITF - Antalya M15 | 2021/06/27 06:30 | Vladimir Korolev v Credit Chaiyarin | 7-5,6-3 |