Stadium: Court 5 Round: 54 Ground: Hardcourt indoor
| ITF M15 - Ithaca | 2021/11/04 16:20 | Osgar O'Hoisin v Evan Bynoe | 3-6,6-4,3-6 |
| ITF M15 - Ithaca | 2021/11/03 16:40 | Evan Zhu v Osgar O'Hoisin | 6-7,3-6 |
| ITF M15 - Cancun | 2021/10/19 14:00 | Juan Sebastian Osorio v Osgar O'Hoisin | 3-6,7-5,6-4 |
| ITF M15 - Cancun | 2021/09/27 14:30 | Jack Gibbens v Osgar O'Hoisin | 3-6,7-6,7-10 |
| ITF M15 - Cancun | 2021/09/26 15:00 | Babji Siva Atturu v Osgar O'Hoisin | 1-6,0-6 |
| ITF M15 - Cancun | 2021/09/25 18:05 | Osgar O'Hoisin v Gerardo L Villasenor | 4-6,2-6 |
| ITF M15 - Cancun | 2021/09/24 19:30 | Osgar O'Hoisin v Leonardo Civita-Telles | 7-5,2-6,7-5 |
| ITF M15 - Cancun | 2021/09/23 19:15 | Jonas Maier v Osgar O'Hoisin | 6-3,4-6,4-6 |
| ITF M15 - East Lansing | 2021/11/15 18:00 | Niroop Vallabhaneni v Peter Kuszynski | 4-6,6-2,10-6 |