| Califórnia - UTR Pro Tennis Series | 2021/02/23 16:00 | Collin Altamirano v Colton Smith | 6-3,5-2 |
| Califórnia - UTR Pro Tennis Series | 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 |
| Califórnia - UTR Pro Tennis Series | 2020/07/03 16:00 | Collin Altamirano v Felix Corwin | 4-6,2-6 |
| Califórnia - UTR Pro Tennis Series | 2020/07/02 19:25 | Keegan Smith v Collin Altamirano | 6-4,6-4 |
| Califórnia - UTR Pro Tennis Series | 2020/07/01 16:00 | Collin Altamirano v Dusty H. Boyer | 7-6,6-7,10-1 |
| Califórnia - UTR Pro Tennis Series | 2020/06/30 16:00 | Nick Chappell v Collin Altamirano | 4-6,1-6 |
| Califórnia - UTR Pro Tennis Series | 2021/02/23 20:00 | Alexander Sarkissian v Kalman Boyd | 6-1,5-0 |
| Califórnia - UTR Pro Tennis Series | 2021/02/21 18:00 | Luis Humberto Lopez v Kalman Boyd | 4-6,5-6 |
| Califórnia - UTR Pro Tennis Series | 2021/02/20 16:00 | Alex Jones v Kalman Boyd | 6-7,5-7 |
| Califórnia - UTR Pro Tennis Series | 2021/02/19 21:30 | Alexander Sarkissian v Kalman Boyd | 6-2,2-6,6-4 |
| Califórnia - UTR Pro Tennis Series | 2021/02/18 19:00 | Aaron Bailey v Kalman Boyd | 6-3,6-2 |
| Califórnia - UTR Pro Tennis Series | 2021/02/17 16:00 | Joshua Ortlip v Kalman Boyd | 6-4,6-3 |
| Califórnia - UTR Pro Tennis Series | 2021/02/15 16:00 | Jonas Maier v Kalman Boyd | 6-2,5-0 |
| ITF - M15 Sharm El Sheikh | 2019/11/06 09:55 | Jesper De Jong v Kalman Boyd | 6-1,6-1 |