| UTR Pro Tennis Series - California | 2021/05/24 16:30 | Rohan Murali v Nicolas Barrientos | 0-6,1-6 |
| ITF M25 Pensacola | 2021/05/19 16:30 | Adrian Andreev v Nicolas Barrientos | 6-4,6-2 |
| ITF M25 Pensacola | 2021/05/18 14:30 | Nicolas Barrientos v Alexander Bernard | 4-6,6-1,10-4 |
| ITF M25 Pensacola | 2021/05/17 15:30 | Nicolas Barrientos v Tennyson Whiting | 6-2,6-3 |
| UTR Pro Tennis Series - California | 2021/02/27 21:30 | Ryan James Storrie v Nicolas Barrientos | 2-6,6-1,3-0 |
| UTR Pro Tennis Series - California | 2021/02/26 20:00 | Joshua Sheehy v Nicolas Barrientos | 5-7,4-5 |
| UTR Pro Tennis Series - California | 2021/02/25 20:00 | Mousheg Hovhannisyan v Nicolas Barrientos | 5-7,3-6 |
| UTR Pro Tennis Series - California | 2021/02/24 16:00 | Blu Baker v Nicolas Barrientos | 0-6,4-6 |
| UTR Pro Tennis Series - California | 2021/05/24 21:00 | Kalman Boyd v Aaron Bailey | 6-2,6-5 |
| UTR Pro Tennis Series - California | 2021/05/23 16:30 | Jakob Schnaitter v Kalman Boyd | 4-6,6-2,7-5 |
| UTR Pro Tennis Series - California | 2021/05/22 18:00 | Kalman Boyd v Alexander Sarkissian | 6-4,6-4 |
| UTR Pro Tennis Series - California | 2021/05/21 16:30 | Ishaan Ravichander v Kalman Boyd | 2-6,2-6 |
| UTR Pro Tennis Series - California | 2021/05/20 15:00 | Gage Brymer v Kalman Boyd | 2-6,2-6 |
| UTR Pro Tennis Series - California | 2021/05/18 15:00 | Eric Hadigian v Kalman Boyd | 2-6,0-6 |
| UTR Pro Tennis Series - California | 2021/05/17 18:00 | Kalman Boyd v Lucas Gomez | 6-3,6-4 |
| UTR Pro Tennis Series - California | 2021/02/28 16:00 | Ryan Seggerman v Kalman Boyd | 6-3,4-6,5-1 |