Stadium: Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/08/15 11:00 | Keisuke Saitoh v Alec Beckley | 6-3,4-6,10-4 |
| ITF M15 Monastir | 2021/08/11 18:35 | Keisuke Saitoh v Dane Sweeny | 1-6,4-6 |
| ITF M15 Monastir | 2021/08/10 07:30 | Masamichi Imamura v Keisuke Saitoh | 6-7,2-6 |
| ITF M15 Monastir | 2021/08/09 07:30 | Babji Siva Atturu v Keisuke Saitoh | 1-6,0-6 |
| ITF M15 Cairo | 2021/08/05 08:00 | Juan Bautista Torres v Keisuke Saitoh | 6-0,6-1 |
| ITF M15 Cairo | 2021/08/04 13:30 | Keisuke Saitoh v Marlon Vankan | 6-4,7-5 |
| ITF M15 Cairo | 2021/08/03 07:30 | Keisuke Saitoh v Alessandro Ragazzi | 6-4,1-6,11-9 |
| ITF M15 Cairo | 2021/07/29 08:00 | Juan Bautista Torres v Keisuke Saitoh | 6-1,6-1 |
| ITF M15 Monastir | 2021/08/15 11:00 | Shohei Chikami v Dheeraj Kodancha Srinivasan | 6-0,6-1 |
| ITF M15 Monastir | 2021/07/07 10:05 | Timur Kiyamov v Shohei Chikami | 6-3,6-0 |
| ITF M15 Monastir | 2021/07/05 14:00 | Aleksandr Lobanov v Shohei Chikami | 3-6,1-6 |
| ITF M15 Monastir | 2021/07/05 08:00 | Liova Ajavon v Shohei Chikami | 1-6,6-7 |
| ITF M15 Monastir | 2021/06/28 09:00 | Shohei Chikami v Jacob Brumm | 5-7,2-6 |
| ITF M15 Monastir | 2021/06/27 11:30 | Shohei Chikami v Connor Di Marco | 6-1,6-2 |
| ITF M15 Monastir | 2021/06/21 12:30 | Uisung Park v Shohei Chikami | 6-4,6-3 |
| ITF M15 Monastir | 2021/06/21 08:00 | Francisco Faigenbaum v Shohei Chikami | 1-6,1-6 |