Stadium: Quadra 3 Round: 25 Ground: Clay
| Challenger Segovia | 2021/07/29 14:00 | Hugo Grenier v Carlos Gimeno Valero | 3-6,6-3,6-2 |
| Challenger Segovia | 2021/07/27 13:50 | Carlos Gimeno Valero v Quentin Halys | 6-3,7-6 |
| Challenger Segovia | 2021/07/26 11:05 | Carlos Gimeno Valero v Carlos Gomez-Herrera | 6-3,2-6,6-4 |
| Challenger Segovia | 2021/07/25 15:20 | Carlos Gimeno Valero v Alejandro Mendoza | 6-1,6-1 |
| Challenger Almaty | 2021/06/16 04:00 | Carlos Gimeno Valero v Brayden Schnur | 4-6,6-7 |
| Challenger Almaty | 2021/06/15 04:00 | Chun Hsin Tseng v Carlos Gimeno Valero | 5-7,6-4,2-6 |
| Challenger Almaty | 2021/06/08 06:55 | Evan Furness v Carlos Gimeno Valero | 1-6,6-2,6-3 |
| Challenger Oeiras | 2021/05/28 15:05 | Carlos Gimeno Valero v Holger Rune | 2-6,4-6 |
| ITF M25 Decatur | 2021/08/04 20:30 | Gonzalo Villanueva v Petros Chrysochos | 1-6,3-6 |
| Challenger Lexington | 2021/07/25 17:00 | Aidan Mchugh v Gonzalo Villanueva | 7-5,2-6,6-3 |
| Challenger Cary | 2021/07/20 15:00 | Roberto Cid Subervi v Gonzalo Villanueva | 3-6,7-5,6-1 |
| UTR Pro Tennis Series Atlanta | 2021/07/16 12:00 | Ivan Yatsuk v Gonzalo Villanueva | 6-1,6-4 |
| UTR Pro Tennis Series Atlanta | 2021/07/15 18:00 | William Mroz Mroz v Gonzalo Villanueva | 3-6,4-5 |
| UTR Pro Tennis Series Atlanta | 2021/07/12 13:30 | Vazha Shubladze v Gonzalo Villanueva | 6-1,6-2 |
| UTR Pro Tennis Series Atlanta | 2021/07/10 13:30 | Gonzalo Villanueva v Andrew Rogers | 6-2,3-6,4-5 |
| UTR Pro Tennis Series Atlanta | 2021/07/08 12:00 | Gonzalo Villanueva v Jorge Panta | 6-3,6-1 |