| Puchar Davisa | 2021/06/17 07:50 | Valentin Vacherot v Osgar O'Hoisin | 6-3,6-4 |
| Puchar Davisa | 2021/06/16 08:00 | Chris Rodesch v Osgar O'Hoisin | 3-6,6-0,6-2 |
| ITF - Gaiba M15 | 2021/06/09 14:05 | Cristian Rodriguez v Osgar O'Hoisin | 7-5,6-4 |
| ITF - Gaiba M15 | 2021/06/08 13:35 | Luca Castelnuovo v Osgar O'Hoisin | 3-6,7-5,8-10 |
| ITF - Gaiba M15 | 2021/06/07 16:55 | Osgar O'Hoisin v Riccardo Di Nocera | 5-7,6-2,10-5 |
| ITF - Marbella M15 | 2021/05/24 09:00 | John Echeverria v Osgar O'Hoisin | 6-7,6-3,16-14 |
| ITF - Monastir M15 | 2021/04/26 08:00 | Osgar O'Hoisin v Harry Wendelken | 6-4,4-6,7-10 |
| ITF - Monastir M15 | 2021/04/25 09:00 | Osgar O'Hoisin v Vladimir Cherkovets | 6-2,6-0 |
| Puchar Davisa | 2021/06/17 09:05 | Raphael Calzi v Liam Delicata | 6-3,6-4 |
| Puchar Davisa | 2021/06/16 09:05 | Lucas Catarina v Liam Delicata | 6-0,6-1 |