Stadion: Court 1 Round: 25 Ground: Clay
| 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 |
| ITF - M25 - Velenje | 2021/07/05 14:35 | Pietro R Scomparin v Taiyo Yamanaka | 2-6,6-1,7-10 |
| ITF - M25 - Wroclaw | 2021/06/28 09:40 | Taiyo Yamanaka v Petr Michnev | 5-7,2-6 |
| ITF - M25 - Telfs | 2021/07/16 09:30 | Gonzalo Lama v Sandro Kopp | 6-1,6-2 |
| ITF - M25 - Telfs | 2021/07/14 08:50 | Francisco Vittar v Sandro Kopp | 2-6,3-6 |
| ITF - M15 - Antalya | 2021/05/18 07:00 | Sandro Kopp v Thomas Deschamps | 6-1,5-7,13-15 |
| ITF - M15 - Antalya | 2021/05/17 07:00 | Sandro Kopp v Gabriel Roveri Sidney | 6-2,6-3 |
| ITF - M15 - Antalya | 2021/05/16 07:00 | Sandro Kopp v Arda Azkara | 6-4,6-1 |
| ITF - M15 - Antalya | 2021/05/13 07:00 | Sandro Kopp v Francesco Forti | 6-4,3-6,2-6 |
| ITF - M15 - Antalya | 2021/05/12 09:00 | Sandro Kopp v Valentin Vanta | 6-7,6-1,6-2 |
| ITF - M15 - Antalya | 2021/05/11 07:00 | Sandro Kopp v Riccardo Di Nocera | 6-3,6-2 |