Stadium: Court 6 N Round: 54 Ground: Hardcourt outdoor
| ITF M15 Edwardsville | 2021/07/20 14:00 | Perez, Alfredo v Montsi, Siphosothando | 6-2,4-6,5-10 |
| UTR Pro Tennis Series Nevada | 2021/06/30 15:00 | Pratt, Jared v Perez, Alfredo | 4-6,2-6 |
| UTR Pro Tennis Series Nevada | 2021/06/28 15:00 | Frye, Bradley v Perez, Alfredo | 6-7,6-6 |
| UTR Pro Tennis Series Nevada | 2021/06/26 15:00 | Joshua Charlton v Perez, Alfredo | 4-4 |
| UTR Pro Tennis Series Nevada | 2021/06/25 15:00 | Barrientos, Nicolas v Perez, Alfredo | 6-7,6-4,3-5 |
| UTR Pro Tennis Series Nevada | 2021/06/24 16:30 | Nicholas Heng v Perez, Alfredo | 6-4,4-6,3-6 |
| UTR Pro Tennis Series Nevada | 2021/06/23 16:30 | Alexander Stater v Perez, Alfredo | 7-6,0-6,4-5 |
| UTR Pro Tennis Series Nevada | 2021/06/21 15:00 | Kyle Kang v Perez, Alfredo | 3-6,6-7 |
| ITF M15 Edwardsville | 2021/07/19 14:00 | Meister, Nicolas v Bybel, Nicholas | 3-6,6-1,10-4 |
| ITF M25 Weston | 2021/06/28 19:00 | Alex Hernandez v Bybel, Nicholas | 6-3,6-1 |
| ITF M15 Champaign | 2021/06/22 15:00 | Farren, Connor v Bybel, Nicholas | 6-4,6-2 |
| ITF M15 Champaign | 2021/06/21 15:00 | Bybel, Nicholas v Parker, Jordan | 6-7,6-2,10-6 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/14 18:00 | Bybel, Nicholas v Ortlip, Joshua | 3-6,3-6 |
| ITF M25 Wichita | 2021/06/08 15:00 | Matias Soto v Bybel, Nicholas | 7-5,7-6 |
| ITF M25 Wichita | 2021/06/07 15:00 | Lakoseljac, Christian v Bybel, Nicholas | 5-7,5-7 |
| ITF - M25 Pensacola | 2021/05/17 14:30 | Abraham Asaba v Bybel, Nicholas | 6-4,6-4 |