| 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 | 2021/08/12 15:30 | Colin Markes v Peter Murphy | 5-7,5-7 |
| UTR Pro Tennis Series Dallas | 2021/08/11 13:00 | Colin Markes v Ryuhei Azuma | 2-6,1-6 |