| UTR Pro Tennis Series Florida | 2021/06/05 18:00 | Top Nidunjianzan v William Mroz Mroz | 2-6,4-5 |
| UTR Pro Tennis Series Florida | 2021/06/04 13:30 | Keshav Chopra v William Mroz Mroz | 6-7,6-2,7-6 |
| UTR Pro Tennis Series Florida | 2021/06/03 14:30 | Joao Ceolin v William Mroz Mroz | 6-3,6-3 |
| UTR Pro Tennis Series Florida | 2021/06/01 16:00 | Jake Beasley v William Mroz Mroz | 6-3,6-6 |
| UTR Pro Tennis Series Florida | 2021/05/31 14:30 | William Mroz Mroz v Karl Poling | 6-3,1-6,6-6 |
| Challenger Little Rock | 2021/05/30 20:10 | Zachary Svajda v Gonzalo Villanueva | 6-0,5-7,6-2 |
| Challenger Salinas 2 | 2021/04/29 15:00 | Gonzalo Villanueva v JC Aragone | 2-6,2-6 |
| Challenger Salinas 2 | 2021/04/28 16:30 | Gonzalo Villanueva v Hernan Casanova | 7-5,6-0 |
| Challenger Salinas 2 | 2021/04/27 14:30 | Gonzalo Villanueva v David Poljak | 5-7,7-6,7-6 |
| Challenger Salinas | 2021/04/19 14:30 | Gonzalo Villanueva v Nicolas Mejia | 3-6,0-6 |
| Challenger Salinas | 2021/04/18 15:00 | Gonzalo Villanueva v Felix Corwin | 6-7,6-4,7-5 |
| ITF M15 Cordoba | 2021/04/06 12:00 | Gonzalo Villanueva v Valerio Aboian | 6-7,3-6 |
| ITF M15 Cordoba | 2021/04/05 14:00 | Gonzalo Villanueva v Mateo Berne | 6-3,6-1 |