Stadium: Centre Court Round: 54 Ground: Hardcourt outdoor
| ITF M15 Naples | 2023/02/21 14:30 | Collin Altamirano v Bryce Nakashima | 3-6,3-6 |
| ITF M15 Naples | 2023/02/20 17:00 | Kousuke Ogura v Collin Altamirano | 2-6,3-6 |
| ITF M15 Edmond | 2023/01/25 22:15 | Ezekiel Clark v Collin Altamirano | 6-0,4-6,6-2 |
| ITF M15 Ithaca | 2023/01/17 18:30 | Nathan Ponwith v Collin Altamirano | 6-4,6-1 |
| ITF M25 Nottingham | 2022/05/10 09:00 | Julian Cash v Collin Altamirano | 6-7,6-2,7-6 |
| ITF M25 Nottingham | 2022/05/04 14:10 | Collin Altamirano v Giovanni Oradini | 3-6,1-6 |
| ITF M15 Orange Park | 2022/04/20 14:00 | Martin Damm v Collin Altamirano | 6-4,7-6 |
| ITF M15 Sunrise | 2022/04/13 15:25 | Collin Altamirano v Ezekiel Clark | 7-6,4-6,2-6 |
| ITF USA F26 Qual | 2015/09/11 19:00 | Chun-Ming Yam v Joseph Cadogan | 1-6,4-6 |
| ITF Hong Kong F1 Qual | 2014/07/05 08:00 | Chun-Ming Yam v Xirui Liu | 6-4,3-6,0-6 |