Stadium: Court 8 Round: 62 Ground: Clay
| ITF M15 Kairo | 2021/01/10 10:30 | Seita Watanabe v Marco Brugnerotto | 3-6,5-7 |
| ITF M15 Sharm El Sheikh | 2020/03/04 08:00 | Seita Watanabe v Jaroslav Pospisil | 3-6,1-6 |
| ITF M15 Sharm El Sheikh | 2020/03/03 08:00 | Seita Watanabe v Iancu-Iustinian Ghinda | 6-0,6-2 |
| ITF M15 Sharm El Sheikh | 2020/03/02 08:00 | Seita Watanabe v Svyatoslav Ilnytskyy | 6-1,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/25 08:00 | Seita Watanabe v Volodymyr Uzhylovskyi | 5-7,3-6 |
| ITF M15 Sharm El Sheikh | 2020/02/24 09:00 | Seita Watanabe v Maurizio Speziali | 6-2,6-0 |
| ITF M15 Sharm El Sheikh | 2020/02/19 16:35 | Vitaliy Sachko v Seita Watanabe | 6-3,6-1 |
| ITF M15 Sharm El Sheikh | 2020/02/18 08:00 | Seita Watanabe v Moritz Trocker | 6-0,6-1 |