| UTR Pro Tennis Series California | 2021/11/29 20:30 | Masato Perera v Stefan Leustian | 6-3,4-6,1-6 |
| UTR Pro Tennis Series California | 2021/07/29 15:00 | Rohan Murali v Stefan Leustian | 1-6,7-6,6-1 |
| UTR Pro Tennis Series California | 2021/07/28 19:30 | Tristan Boyer v Stefan Leustian | 6-1,6-1 |
| UTR Pro Tennis Series California | 2021/07/27 21:00 | Kris Van Wyk v Stefan Leustian | 1-6,0-1 |
| UTR Pro Tennis Series California | 2021/07/26 16:30 | Stefan Leustian v Quinn Vandecasteele | 5-7,4-5 |
| ITF M15 Cancun | 2020/02/19 14:00 | Stefan Leustian v Matic Spec | 5-7,5-7 |
| ITF M25 Fort Worth | 2019/10/20 15:00 | Stefan Leustian v Ronald Hohmann | 4-6,6-7 |
| ITF USA F24 | 2018/09/10 17:00 | Stefan Leustian v Nicolas Moreno De Alboran | 3-6,2-6 |