Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Almada | 2021/07/10 08:30 | Fabio Coelho v Joao Lucas Reis da Silva | 6-3,6-4 |
| ITF M15 Almada | 2021/07/09 10:20 | Joao Lucas Reis da Silva v Diego F Flores | 6-4,7-6 |
| ITF M15 Almada | 2021/07/08 12:30 | Joao Lucas Reis da Silva v Daniel Batista | 6-2,6-3 |
| ITF M15 Almada | 2021/07/06 10:30 | Joao Lucas Reis da Silva v Kuzey Cekirge | 6-1,6-3 |
| ITF M25 The Hague | 2021/07/01 12:10 | Jelle Sels v Joao Lucas Reis da Silva | 6-3,6-3 |
| ITF M25 The Hague | 2021/06/30 10:00 | Niels Visker v Joao Lucas Reis da Silva | 6-4,4-6,4-6 |
| ITF M25 Alkmaar | 2021/06/22 17:00 | Joao Lucas Reis da Silva v Jelle Sels | 5-7,1-6 |
| ITF M15 Antalya | 2021/06/16 14:05 | Joao Lucas Reis da Silva v Fermin Tenti | 2-6,5-7 |
| ITF M15 Monastir | 2021/05/26 09:30 | Moez Echargui v Yusuke Takahashi | 7-6,0-6,7-6 |
| ITF M15 Monastir | 2021/05/21 08:30 | Jeremy Beale v Yusuke Takahashi | 1-6,6-4,6-2 |
| ITF M15 Monastir | 2021/05/20 11:15 | Luca Potenza v Yusuke Takahashi | 6-3,6-7,2-6 |
| ITF M15 Monastir | 2021/05/19 13:05 | Constantin Bittoun Kouzmine v Yusuke Takahashi | 3-6,0-6 |
| ITF M15 Monastir | 2021/05/13 10:30 | Yusuke Takahashi v Omni Kumar | 3-6,6-2,1-6 |
| ITF M15 Monastir | 2021/05/11 09:50 | Yusuke Takahashi v Mehdi Benchakroun | 6-4,6-3 |
| ITF M15 Monastir | 2021/05/07 08:30 | Mohamed Aziz Dougaz v Yusuke Takahashi | 6-3,6-4 |
| ITF M15 Monastir | 2021/05/06 13:00 | Constantin Bittoun Kouzmine v Yusuke Takahashi | 2-6,1-6 |