| UTR Pro Tennis Series California | 2021/11/09 22:00 | Ray Lo v Dzianis Zharyn | 7-6,5-4 |
| UTR Pro Tennis Series California | 2021/11/08 16:00 | Ray Lo v Alex Kuperstein | 6-2,6-2 |
| UTR Pro Tennis Series California | 2021/11/07 17:30 | Rithvik Krishna v Ray Lo | 6-7,6-6 |
| UTR Pro Tennis Series Dallas | 2021/09/05 13:00 | Ray Lo v Alejandro Moreno | 6-7,1-5 |
| UTR Pro Tennis Series Dallas | 2021/09/04 17:40 | Jacob Brumm v Ray Lo | 5-7,3-5 |
| UTR Pro Tennis Series Dallas | 2021/09/03 17:30 | Ray Lo v Ilgiz Valiev | 6-3,6-2 |
| UTR Pro Tennis Series Dallas | 2021/09/02 17:30 | Ray Lo v Evan Zhu | 5-7,3-6 |
| UTR Pro Tennis Series Dallas | 2021/08/31 17:00 | Orel Ovil v Ray Lo | 6-3,1-6,6-6 |
| 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 |
| UTR Pro Tennis Series Florida | 2021/09/14 16:30 | Omar Maldonado v Roman Postolka | 0-6,3-5 |