Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| 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 Antalya | 2021/06/10 09:10 | Joao Lucas Reis da Silva v Francisco Comesana | 4-6,6-7 |
| ITF M15 Antalya | 2021/06/08 09:15 | Yu Hsiou Hsu v Joao Lucas Reis da Silva | 5-7,6-7 |
| ITF M15 Sarajevo | 2021/06/05 08:30 | Joao Lucas Reis da Silva v Hernan Casanova | 7-6,3-6,1-6 |
| ITF M15 Sarajevo | 2021/06/04 09:00 | Joao Lucas Reis da Silva v Luka Petrovic | 6-3,6-3 |
| ITF M15 Almada | 2021/07/05 11:30 | Kuzey Cekirge v Matthew Dellavedova | 6-3,6-3 |
| ITF M15 Almada | 2021/07/04 13:00 | Kuzey Cekirge v Francisco Faria | 6-1,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/06/26 09:30 | Agustin Velotti v Kuzey Cekirge | 6-1,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/06/24 08:30 | Kuzey Cekirge v Federico Zeballos | 1-6,6-4,7-5 |
| UTR Pro Tennis Series Barcelona | 2021/06/23 09:30 | Kuzey Cekirge v Ihor Dudun | 6-0,5-1 |
| UTR Pro Tennis Series Barcelona | 2021/06/22 11:00 | Kuzey Cekirge v David Perez Sanz | 6-1,6-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/20 10:00 | Kuzey Cekirge v Tristan Meraut | 6-3,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/06/10 11:00 | Kuzey Cekirge v Xavier Gabarro | 3-6,6-7 |