Stadium: Court 8 Round: 25 Ground: Clay
| ATP Acapulco | 2021/03/14 03:05 | Collin Altamirano v Damir Dzumhur | 6-4,6-7,0-6 |
| UTR Pro Tennis Series California | 2021/02/23 16:00 | Collin Altamirano v Colton Smith | 6-3,5-2 |
| UTR Pro Tennis Series California | 2021/02/22 18:00 | Collin Altamirano v Alexander Sarkissian | 5-7,3-6 |
| Challenger Lima | 2020/11/24 15:00 | Jesper De Jong v Collin Altamirano | 6-2,6-4 |
| Challenger Lima | 2020/11/22 15:00 | Collin Altamirano v Thiago Agustin Tirante | 4-6,4-6 |
| UTR Pro Tennis Series California | 2020/07/03 16:00 | Collin Altamirano v Felix Corwin | 4-6,2-6 |
| UTR Pro Tennis Series California | 2020/07/02 19:25 | Keegan Smith v Collin Altamirano | 6-4,6-4 |
| UTR Pro Tennis Series California | 2020/07/01 16:00 | Collin Altamirano v Dusty H. Boyer | 7-6,6-7,10-1 |
| ITF M15 Cancun | 2021/12/17 18:00 | Isaiah Strode v Ezekiel Clark | 2-6,6-3,6-0 |
| ITF M15 Cancun | 2021/12/16 17:00 | Ezekiel Clark v Makoto Ochi | 2-6,7-5,6-1 |
| ITF M15 Cancun | 2021/12/14 17:00 | Bryce Nakashima v Ezekiel Clark | 4-6,2-6 |
| ITF M15 Cancun | 2021/12/11 14:00 | Christian Langmo v Ezekiel Clark | 6-4,7-6 |
| ITF M15 Cancun | 2021/12/10 16:10 | Arklon H D Pino v Ezekiel Clark | 3-6,3-6 |
| ITF M15 Cancun | 2021/12/09 14:00 | Giles Hussey v Ezekiel Clark | 2-6,2-6 |
| ITF M15 Cancun | 2021/12/08 14:00 | Ezekiel Clark v Conner Huertas Del Pino | 7-6,6-3 |
| Challenger Champaign | 2021/11/16 01:15 | Ezekiel Clark v Christian Harrison | 6-4,3-6,3-6 |