Stadium: Court 2 Round: 26 Ground: Hardcourt indoor
| ITF M25 Montreal | 2023/03/14 19:00 | Ezekiel Clark v Tristan McCormick | 6-2,3-6,2-6 |
| ITF M15 Naples | 2023/03/04 15:00 | Federico Agustin Gomez v Tristan McCormick | 2-6,7-5,6-3 |
| ITF M15 Naples | 2023/03/03 16:20 | Tristan McCormick v Daniel Paty | 7-6,6-4 |
| ITF M15 Naples | 2023/03/02 18:10 | Tristan McCormick v Evan Bynoe | 6-4,6-2 |
| ITF M15 Naples | 2023/03/01 18:30 | Tristan McCormick v Lucas Renard | 4-6,6-4,6-3 |
| Challenger Rome GA | 2023/02/19 21:55 | Pedro Rodenas v Tristan McCormick | 6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2023/02/08 07:55 | Tristan McCormick v Boris Butulija | 6-3,4-6,5-7 |
| ITF M25 Sunderland | 2023/01/27 11:15 | Martin Damm v Tristan McCormick | 7-6,6-2 |
| ITF M25 Montreal | 2023/03/15 19:55 | Herbert Jody Maginley v Osgar O'Hoisin | 4-6,6-7 |
| ITF M25 Montreal | 2023/03/07 19:55 | Sebastian Gima v Osgar O'Hoisin | 6-4,6-3 |
| Challenger Monterrey | 2023/02/20 18:00 | Bernard Tomic v Osgar O'Hoisin | 6-1,6-4 |
| Challenger Monterrey | 2023/02/19 19:35 | Luciano Doria v Osgar O'Hoisin | 3-6,3-6 |
| ITF M25 Santo Domingo | 2023/02/14 16:55 | Kyle Seelig v Osgar O'Hoisin | 6-2,6-3 |
| Davis Cup | 2023/02/03 18:35 | Arklon H D Pino v Osgar O'Hoisin | 6-2,6-3 |
| ITF M15 Edmond | 2023/01/26 16:55 | Lucas Renard v Osgar O'Hoisin | 6-2,3-6,6-3 |
| ITF M15 Edmond | 2023/01/25 19:40 | Emmett Ward v Osgar O'Hoisin | 4-6,5-7 |