Stadium: Court 8 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2021/09/23 19:15 | Jonas Maier v Osgar O'Hoisin | 6-3,4-6,4-6 |
| ITF M15 Cancun | 2021/09/22 20:25 | Luciano Doria v Osgar O'Hoisin | 4-6,2-6 |
| ITF M15 Cancun | 2021/09/21 14:00 | Emil Reinberg v Osgar O'Hoisin | 6-3,6-3 |
| ITF M25 Champaign | 2021/09/14 17:00 | Perry Gregg v Osgar O'Hoisin | 6-2,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/08/08 08:30 | Olexiy Kolisnyk v Osgar O'Hoisin | 7-6,3-6,5-2 |
| UTR Pro Tennis Series Barcelona | 2021/08/07 11:00 | Osgar O'Hoisin v Francois Musitelli | 2-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/06 10:00 | Osgar O'Hoisin v Nicolas Bianchi | 4-6,6-0,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/04 08:30 | Osgar O'Hoisin v Kuzey Cekirge | 3-6,6-7 |
| ITF M15 Cancun | 2021/09/23 21:20 | Leonardo Civita-Telles v Christian Langmo | 6-7,6-3,6-3 |
| ITF M15 Cancun | 2021/09/21 14:00 | Seita Watanabe v Leonardo Civita-Telles | 3-6,6-4,5-7 |
| ITF M25 Sintra | 2021/09/07 08:30 | Francisco Cabral v Leonardo Civita-Telles | 6-3,6-4 |
| ITF M25 Sintra | 2021/09/06 10:35 | Jaime Faria v Leonardo Civita-Telles | 1-6,2-6 |
| ITF M15 Almada | 2021/07/04 10:30 | Leonardo Civita-Telles v Tomas Pinho | 4-6,3-6 |
| ITF M15 Monastir | 2021/03/24 08:30 | Leonardo Civita-Telles v Hazem Naw | 6-4,3-6,5-7 |
| ITF M15 Monastir | 2021/03/22 15:45 | Igor Marcondes v Leonardo Civita-Telles | 4-6,4-6 |
| ITF M15 Monastir | 2021/03/22 10:30 | Edoardo Zanada v Leonardo Civita-Telles | 2-6,4-6 |