| UTR Pro Tennis Series Dallas | 2021/09/01 13:00 | Colin Markes v Stefan Latinov | 6-2,6-3 |
| UTR Pro Tennis Series Dallas | 2021/08/31 15:00 | Colin Markes v Jerry Barton | 6-3,6-1 |
| UTR Pro Tennis Series Dallas | 2021/08/30 16:00 | Jacob Brumm v Colin Markes | 1-6,5-7 |
| UTR Pro Tennis Series California | 2021/08/28 16:30 | Colin Markes v Lucas Gomez | 6-2,4-6,3-6 |
| UTR Pro Tennis Series California | 2021/08/27 21:00 | Ryan Seggerman v Colin Markes | 2-6,6-7 |
| UTR Pro Tennis Series California | 2021/08/24 20:00 | Colin Markes v Alfredo Perez | 3-6,5-6 |
| UTR Pro Tennis Series California | 2021/08/23 21:00 | Colin Markes v Warren Wood | 6-1,6-4 |
| UTR Pro Tennis Series California | 2021/08/22 16:30 | Colin Markes v Keenan Mayo | 6-1,0-6,5-4 |
| UTR Pro Tennis Series Dallas | 2021/09/02 14:30 | Jerry Barton v Sander Jong | 3-6,2-6 |
| UTR Pro Tennis Series Dallas | 2021/08/31 14:30 | Jacob Brumm v Sander Jong | 4-6,2-6 |
| UTR Pro Tennis Series Dallas | 2021/08/30 17:30 | Sander Jong v Stefan Latinov | 6-2,6-0 |
| ITF M15 Oldenzaal | 2021/08/20 10:20 | Sander Jong v Guy Den Heijer | 5-7,7-5,4-6 |
| ITF M15 Oldenzaal | 2021/08/18 08:00 | Simone Roncalli v Sander Jong | 4-6,3-6 |
| Challenger Amersfoort | 2021/07/12 09:00 | Sander Jong v Carlos Sanchez Jover | 6-1,6-4 |
| Challenger Amersfoort | 2021/07/11 10:00 | Eduard Esteve Lobato v Sander Jong | 2-6,5-7 |
| ITF M25 The Hague | 2021/06/30 12:40 | Sander Jong v Jesper De Jong | 5-7,6-7 |