Stadium: Court 5 Round: 27 Ground: Hardcourt outdoor
| ITF M25 - Tulsa | 2021/06/17 16:20 | Hiroki Moriya v Nicolas Barrientos | 1-6,3-6 |
| ITF M25 - Tulsa | 2021/06/16 23:30 | Trent Bryde v Nicolas Barrientos | 3-6,3-6 |
| ITF M25 - Tulsa | 2021/06/15 14:00 | Gage Brymer v Nicolas Barrientos | 5-7,5-7 |
| ITF M25 - Tulsa | 2021/06/14 15:00 | Juan Carlos Aguilar v Nicolas Barrientos | 3-6,3-6 |
| UTR Pro Tennis Series - Californië | 2021/05/30 15:00 | Kyle Kang v Nicolas Barrientos | 2-6,6-2,3-6 |
| UTR Pro Tennis Series - Californië | 2021/05/29 15:00 | Joshua Ortlip v Nicolas Barrientos | 1-6,7-6,2-5 |
| UTR Pro Tennis Series - Californië | 2021/05/28 16:30 | Eric Hadigian v Nicolas Barrientos | 3-6,2-6 |
| UTR Pro Tennis Series - Californië | 2021/05/26 18:00 | Nicolas Barrientos v Aaron Bailey | 6-4,5-2 |
| ITF M25 - Tulsa | 2021/06/17 16:15 | Tristan Schoolkate v Ezekiel Clark | 4-6,3-6 |
| ITF M25 - Tulsa | 2021/06/17 01:55 | Ezekiel Clark v Nicolas Alvarez | 6-4,6-2 |
| ITF M25 - Tulsa | 2021/06/15 15:50 | Noah Schachter v Ezekiel Clark | 1-6,2-6 |
| ITF M25 - Tulsa | 2021/06/14 22:00 | Benjamin Kittay v Ezekiel Clark | 6-4,1-6,4-10 |
| ITF M25 - Wichita | 2021/06/10 19:40 | Felix Corwin v Ezekiel Clark | 3-6,6-3,6-3 |
| ITF M25 - Wichita | 2021/06/09 23:00 | Ezekiel Clark v Samuel Beren | 6-4,6-2 |
| ITF M15 - Santo Domingo | 2020/12/11 13:30 | Nick Chappell v Ezekiel Clark | 6-3,2-6,6-1 |
| ITF M15 - Santo Domingo | 2020/12/10 13:30 | Ezekiel Clark v Jose Olivares | 6-3,6-2 |