Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| ITF M25 Setubal | 2021/10/08 12:15 | Yusuke Takahashi v Laurent Lokoli | 2-6,6-2,0-6 |
| ITF M25 Setubal | 2021/10/07 13:55 | Yusuke Takahashi v Alberto Barroso Campos | 6-4,6-3 |
| ITF M25 Setubal | 2021/10/06 10:00 | Mukund Sasikumar v Yusuke Takahashi | 3-6,3-6 |
| ITF M25 Falun | 2021/09/29 11:00 | Yusuke Takahashi v Khumoyun Sultanov | 2-6,0-6 |
| ITF M25 Falun | 2021/09/27 12:00 | Michal Dembek v Yusuke Takahashi | 6-7,6-2,3-6 |
| Challenger Columbus | 2021/09/19 14:00 | Gijs Brouwer v Yusuke Takahashi | 6-1,7-6 |
| ITF M25 Decatur | 2021/08/05 15:00 | Yusuke Takahashi v Gijs Brouwer | 1-6,0-6 |
| ITF M25 Decatur | 2021/08/04 16:25 | Rinky Hijikata v Yusuke Takahashi | 2-6,6-7 |
| Challenger Lisbon | 2021/09/27 11:30 | Lucas Gerch v Daniel Michalski | 6-7,3-6 |
| Challenger Lisbon | 2021/09/26 10:45 | Christopher Heyman v Lucas Gerch | 4-6,7-6,5-7 |
| ITF M25 Pardubice | 2021/09/22 08:00 | Tim Handel v Lucas Gerch | 7-6,7-5 |
| ITF M25 Madrid | 2021/09/15 09:20 | Lucas Gerch v Alberto Barroso Campos | 4-6,6-7 |
| Challenger Seville | 2021/09/07 11:00 | Lucas Gerch v Carlos Taberner | 1-6,4-6 |
| Challenger Seville | 2021/09/06 09:00 | Mats Rosenkranz v Lucas Gerch | 3-6,7-5,4-6 |
| Challenger Seville | 2021/09/05 10:30 | Alberto Barroso Campos v Lucas Gerch | 2-6,1-6 |
| Challenger Warsaw | 2021/08/22 13:35 | Johan Nikles v Lucas Gerch | 6-4,7-5 |