Stadium: Court 10 Round: 62
| ITF Ireland F1 | 2018/07/31 09:00 | Alexander Jhun v Osgar O'Hoisin | 7-6,3-6,4-6 |
| ITF Ireland F1 | 2017/07/18 10:40 | Osgar O'Hoisin v Alexander Jhun | 4-6,6-2,6-3 |
| ITF Portugal F14 | 2018/08/08 09:00 | Alexander Jhun v Fred Gil | 4-6,1-6 |
| ITF Portugal F14 | 2018/08/05 07:00 | Alexander Jhun v George Foster | 6-3,6-2 |
| ITF Ireland F1 | 2018/07/31 09:00 | Alexander Jhun v Osgar O'Hoisin | 7-6,3-6,4-6 |
| ITF Portugal F9 | 2018/06/21 10:30 | Baptiste Crepatte v Alexander Jhun | 6-3,6-4 |
| ITF Portugal F9 | 2018/06/19 13:25 | Francisco Cabral v Alexander Jhun | 6-3,1-6,3-6 |
| ITF Portugal F9 | 2018/06/17 09:00 | Alexander Jhun v Ben Jones | 6-2,6-3 |
| ITF Portugal F9 | 2018/06/16 11:30 | Alexander Jhun v Francisco Oliveira | 4-6,6-3,6-2 |
| ITF Tunisia F21 | 2018/05/30 09:00 | Eros Siringo v Alexander Jhun | 6-3,7-6 |
| ITF Ireland F1 | 2018/08/02 15:55 | Osgar O'Hoisin v Ryan James Storrie | 4-6,4-6 |
| ITF Ireland F1 | 2018/07/31 09:00 | Alexander Jhun v Osgar O'Hoisin | 7-6,3-6,4-6 |
| ITF USA F19B Qual | 2018/07/16 17:05 | Osgar O'Hoisin v Aleksandar Kovacevic | 4-6,3-6 |
| Challenger Winnetka Qual | 2018/07/08 16:50 | Osgar O'Hoisin v Alex Rybakov | 3-6,3-6 |
| Challenger Winnetka Qual | 2018/07/07 19:35 | Osgar O'Hoisin v Emmett Ward | 6-2,2-6,6-3 |
| ITF USA F18 | 2018/06/27 18:00 | Osgar O'Hoisin v Sean Sculley | 3-6,0-6 |
| ITF USA F15 Qual | 2018/06/17 14:00 | Gage Brymer v Osgar O'Hoisin | 6-4,6-7,7-6 |
| ITF USA F15 Qual | 2018/06/16 13:00 | Collin Thomson v Osgar O'Hoisin | 4-6,5-7 |