Stadium: Court 3 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/07/25 07:00 | Stevan Popovic v Taiyo Yamanaka | 6-3,4-6,10-7 |
| ITF M25 Kottingbrunn | 2021/07/21 12:05 | Taiyo Yamanaka v Sandro Kopp | 1-6,2-6 |
| ITF M25 Kottingbrunn | 2021/07/20 07:55 | Taiyo Yamanaka v Benedikt Emesz | 7-6,5-7,8-10 |
| ITF M25 Kottingbrunn | 2021/07/19 08:00 | Taiyo Yamanaka v Michal Novansky | 7-5,4-6,11-9 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Taiyo Yamanaka v Leon Benedict | 6-4,6-1 |
| ITF M25 Telfs | 2021/07/13 09:10 | Taiyo Yamanaka v George Botezan | 1-6,1-6 |
| ITF M25 Telfs | 2021/07/12 13:30 | Taiyo Yamanaka v Erwin Troebinger | 6-4,6-1 |
| ITF M25 Velenje | 2021/07/06 08:00 | Alessandro Bellifemine v Taiyo Yamanaka | 6-3,6-2 |