| Flórida - UTR Pro Tennis Series | 2021/01/19 17:30 | David Volfson v Jordi Arconada | 5-7,6-7 |
| Flórida - UTR Pro Tennis Series | 2021/01/18 14:00 | Joshua Sheehy v David Volfson | 6-3,5-2 |
| ITF - M15 Santo Domingo | 2020/12/09 13:30 | Nick Chappell v David Volfson | 6-1,6-1 |
| ITF - M15 Santo Domingo | 2020/12/08 13:30 | David Volfson v Austin Ansari | 6-1,6-3 |
| ITF - M15 Santo Domingo | 2020/12/07 14:00 | David Volfson v Rowland Phillips | 6-2,6-2 |
| ITF - M15 Santo Domingo | 2020/12/01 13:30 | David Volfson v Rowland Phillips | 6-7,6-1,1-10 |
| ITF - M15 Santo Domingo | 2020/11/30 15:00 | David Volfson v Angel J Maleno Rosario | 6-0,6-1 |
| ITF - M15 Quinta do Lago | 2020/11/05 10:00 | David Volfson v Matteo Arnaldi | 1-6,5-7 |
| Flórida - UTR Pro Tennis Series | 2021/01/18 15:30 | Matija Pecotic v Charles Sullivan | 6-2,6-2 |
| Flórida - UTR Pro Tennis Series | 2021/01/16 14:00 | Charles Sullivan v Fletcher Scott | 6-4,6-7,4-6 |
| Flórida - UTR Pro Tennis Series | 2021/01/14 20:13 | Charles Sullivan v Gabrielius Guzauskas | 7-5,3-0 |
| Flórida - UTR Pro Tennis Series | 2021/01/13 16:00 | Harris Walker v Charles Sullivan | 6-4,5-4 |
| Flórida - UTR Pro Tennis Series | 2021/01/12 21:00 | Zachary Svajda v Charles Sullivan | 1-4 |
| Flórida - UTR Pro Tennis Series | 2021/01/10 18:00 | Ronan Jachuck v Charles Sullivan | 2-6,7-5,5-4 |
| ITF - EUA F13 - Qualificação | 2018/06/09 15:30 | Andrew Carter v Charles Sullivan | 4-6,6-2,6-0 |
| ITF - EUA F11 | 2018/04/15 12:00 | Charles Sullivan v Marcelo Sepulveda | 2-6,3-6 |