| UTR Pro Tennis Series Atlanta | 2021/07/14 19:30 | William Mroz Mroz v Vazha Shubladze | 6-2,5-1 |
| UTR Pro Tennis Series Atlanta | 2021/07/11 20:45 | Ivan Yatsuk v William Mroz Mroz | 3-6,7-6,4-5 |
| UTR Pro Tennis Series Florida | 2021/06/06 16:00 | Jonah Braswell v William Mroz Mroz | 4-6,6-2,6-6 |
| 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 |
| 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 |
| UTR Pro Tennis Series Atlanta | 2021/07/07 12:00 | Samuel Rubell v Gonzalo Villanueva | 4-6,3-6 |
| UTR Pro Tennis Series Atlanta | 2021/07/05 16:30 | Gonzalo Villanueva v Jake Krug | 6-4,5-4 |
| ITF M15 Weston | 2021/07/04 15:00 | Gonzalo Villanueva v Liam Draxl | 4-6,6-3,3-6 |
| ITF M15 Weston | 2021/07/03 14:00 | Cannon Kingsley v Gonzalo Villanueva | 4-6,7-6,2-6 |
| ITF M15 Weston | 2021/07/02 19:15 | Axel Nefve v Gonzalo Villanueva | 6-2,1-6,8-10 |