Stadium: Court 10 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Antalya | 2023/05/07 07:00 | Alexander Donski v Collin Altamirano | 6-4,6-4 |
| ITF M15 Antalya | 2023/04/30 07:00 | Lorenzo Joaquin Rodriguez v Collin Altamirano | 6-1,4-6,11-9 |
| 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 Sharm El Sheikh | 2020/02/09 08:00 | Oleksandr Ovcharenko v Zhao Zhao | 6-4,6-4 |
| ITF M15 Sharm El Sheikh | 2020/02/03 08:00 | Giuseppe Tresca v Zhao Zhao | 6-0,6-2 |
| Australian Open WC | 2019/12/03 04:15 | Yuki Mochizuki v Zhao Zhao | 6-2,6-4 |
| Challenger Ningbo | 2019/10/14 02:00 | Sidharth Rawat v Zhao Zhao | 7-6,1-6,6-1 |
| ITF M15 Nanchang | 2019/09/30 07:40 | Zhao Zhao v Natthasith Kunsuwan | 1-6,6-1,7-10 |
| ITF M15 Nanchang | 2019/09/30 02:00 | Zhao Zhao v Yu Lun Xie | 6-1,6-2 |
| ITF M15 Nanchang | 2019/09/29 02:00 | Zhao Zhao v Jing Ke Chen | 6-2,6-1 |
| ATP Zhuhai | 2019/09/21 08:35 | Zhao Zhao v Yuichi Sugita | 0-6,0-6 |