Estadio: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M25 Champaign | 2023/07/18 16:55 | Alexander Petrov v Nikita Filin | 6-1,7-5 |
| Challenger de Calgary | 2023/11/05 17:55 | Alafia Ayeni v Collin Altamirano | 7-6,6-4 |
| ITF M25 Edmonton | 2023/11/02 16:00 | Giles Hussey v Collin Altamirano | 6-4,6-3 |
| ITF M25 Edmonton | 2023/10/31 23:25 | Collin Altamirano v Brayden Schnur | 6-4,2-6,6-4 |
| ITF M25 Harlingen | 2023/10/26 18:50 | Marcus McDaniel v Collin Altamirano | 6-2,6-3 |
| ITF M25 Harlingen | 2023/10/25 16:05 | João Vitor Gonçalves Ceolin v Collin Altamirano | 4-6,4-6 |
| ITF M25 Takasaki | 2023/09/23 01:40 | Makoto Ochi v Collin Altamirano | 6-7,6-1,6-2 |
| ITF M25 Takasaki | 2023/09/22 01:00 | Kazuki Nishiwaki v Collin Altamirano | 3-6,1-6 |
| ITF M25 Takasaki | 2023/09/21 03:50 | Collin Altamirano v Hiroyasu Ehara | 6-4,6-1 |