Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/08/26 07:30 | Kyle Seelig v Jumpei Yamasaki | 6-0,7-5 |
| ITF M15 Monastir | 2021/08/25 07:30 | Keisuke Saitoh v Jumpei Yamasaki | 1-6,1-6 |
| ITF M15 Monastir | 2021/08/18 07:30 | Mateo Nicolas Martinez v Jumpei Yamasaki | 5-7,6-1,7-5 |
| ITF M15 Monastir | 2021/08/11 18:25 | Sho Shimabukuro v Jumpei Yamasaki | 6-3,6-2 |
| ITF M25 Decatur | 2021/08/05 17:55 | Jumpei Yamasaki v Yunseong Chung | 2-6,2-6 |
| ITF M25 Decatur | 2021/08/04 21:50 | Aleksandar Kovacevic v Jumpei Yamasaki | 4-6,6-3,3-6 |
| ITF M25 Decatur | 2021/08/03 17:10 | Jumpei Yamasaki v Stefan Dostanic | 6-4,6-4 |
| ITF M25 Decatur | 2021/08/02 15:00 | Jumpei Yamasaki v Carson Haskins | 6-1,6-2 |
| ITF M15 Oldenzaal | 2021/08/18 12:45 | Alec Deckers v Ryan Nijboer | 6-3,2-6,4-6 |
| ITF M15 Monastir | 2021/08/11 07:30 | Grigoriy Lomakin v Alec Deckers | 3-6,6-3,6-4 |
| ITF M15 Monastir | 2021/08/01 10:00 | Mateo Nicolas Martinez v Alec Deckers | 6-7,7-5,10-7 |
| ITF M15 Monastir | 2021/07/28 08:00 | Gabriele Bosio v Alec Deckers | 7-6,6-2 |
| ITF M15 Monastir | 2021/07/26 14:00 | Joshua Paris v Alec Deckers | 4-6,6-7 |
| ITF M15 Monastir | 2021/07/26 08:00 | Alec Deckers v Matthew Dellavedova | 7-5,2-6,10-7 |
| ITF M15 Monastir | 2021/07/25 09:00 | Skander Ben Abdallah v Alec Deckers | 2-6,3-6 |
| ITF M25 The Hague | 2021/06/27 08:00 | Marvin Netuschil v Alec Deckers | 6-4,6-2 |