Stadium: Court 6 Round: 62 Ground: Clay
| UTR Pro Tennis Series California | 2021/11/12 20:00 | Ray Lo v Roman Postolka | 7-6,7-5 |
| UTR Pro Tennis Series California | 2021/11/09 19:00 | Roman Postolka v Shahin Khaledan | 6-2,3-6,6-3 |
| UTR Pro Tennis Series California | 2021/11/08 20:30 | Roman Postolka v Conrad Brown | 6-4,6-2 |
| UTR Pro Tennis Series California | 2021/11/07 20:30 | Roman Postolka v Emmanuel Coste | 7-5,6-0 |
| ITF M15 Lubbock | 2021/09/27 15:00 | Piotr Pawlak v Roman Postolka | 6-3,6-2 |
| UTR Pro Tennis Series Florida | 2021/09/19 14:00 | Matthew Segura v Roman Postolka | 1-1 |
| UTR Pro Tennis Series Florida | 2021/09/17 12:00 | Roman Postolka v Michal Schmid | 5-7,1-5 |
| UTR Pro Tennis Series Florida | 2021/09/15 12:00 | Nikolay Sysoev v Roman Postolka | 2-6,2-6 |