| UTR Pro Tennis Series California | 2021/02/19 17:30 | Luis Humberto Lopez v Spencer Johnson | 0-6,3-6 |
| UTR Pro Tennis Series California | 2021/07/20 16:30 | Spencer Johnson v Quinn Vandecasteele | 2-6,6-7 |
| UTR Pro Tennis Series California | 2021/07/19 18:00 | Spencer Johnson v Nathan Han | 5-7,6-1,6-5 |
| UTR Pro Tennis Series California | 2021/07/18 18:45 | Spencer Johnson v Samuel Rubell | 6-3,6-7,6-6 |
| UTR Pro Tennis Series California | 2021/05/30 15:00 | Spencer Johnson v Aaron Bailey | 6-0,5-4 |
| UTR Pro Tennis Series California | 2021/05/29 15:00 | Sema Pankin v Spencer Johnson | 6-2,5-7,5-6 |
| UTR Pro Tennis Series California | 2021/05/27 16:30 | Rudy Quan v Spencer Johnson | 2-6,6-4,3-6 |
| UTR Pro Tennis Series California | 2021/05/26 16:30 | Joshua Ortlip v Spencer Johnson | 6-4,5-4 |
| UTR Pro Tennis Series California | 2021/05/25 21:00 | Gabriel Evans v Spencer Johnson | 3-6,2-6 |
| UTR Pro Tennis Series California | 2021/07/20 18:00 | Luis Humberto Lopez v Tim Dzhurinskiy | 6-2,4-6,6-2 |
| UTR Pro Tennis Series California | 2021/07/19 21:30 | Luis Humberto Lopez v Pierce Rollins | 3-6,3-5 |
| UTR Pro Tennis Series California | 2021/07/18 16:30 | Bradley Frye v Luis Humberto Lopez | 6-2,5-4 |
| UTR Pro Tennis Series California | 2021/05/22 16:30 | Luis Humberto Lopez v Jackson Allen | 3-6,2-6 |
| UTR Pro Tennis Series California | 2021/05/20 19:30 | Luis Humberto Lopez v Jakob Schnaitter | 4-6,7-5,5-2 |
| UTR Pro Tennis Series California | 2021/05/19 21:30 | Luis Humberto Lopez v Paul Barretto | 5-7,7-5,3-1 |
| UTR Pro Tennis Series California | 2021/05/18 18:00 | Luis Humberto Lopez v Kyle Kang | 7-5,1-6,3-6 |
| UTR Pro Tennis Series California | 2021/05/17 15:00 | Luis Humberto Lopez v Isaiah Strode | 4-6,2-6 |