| UTR Pro Tennis Series - Nevada | 2021/06/29 15:00 | Karl Lee v Bradley Frye | 3-6,6-7 |
| UTR Pro Tennis Series - Nevada | 2021/06/28 18:00 | Karl Lee v Jared Pratt | 6-4,6-3 |
| Califórnia - UTR Pro Tennis Series | 2021/02/14 16:00 | Kyle Kang v Karl Lee | 7-6,6-3 |
| Califórnia - UTR Pro Tennis Series | 2021/02/13 20:30 | Alejandro Mendoza v Karl Lee | 3-6,4-5 |
| Califórnia - UTR Pro Tennis Series | 2021/02/11 20:00 | Karl Lee v Isaiah Strode | 1-6,0-5 |
| Califórnia - UTR Pro Tennis Series | 2021/02/10 16:00 | Karl Lee v Joshua Ortlip | 4-6,6-2,0-6 |
| Califórnia - UTR Pro Tennis Series | 2021/02/09 18:00 | Karl Lee v Alexander Sarkissian | 6-0,6-7,2-6 |
| Califórnia - UTR Pro Tennis Series | 2021/02/08 18:00 | Karl Lee v Alec Adamson | 3-6,6-1,5-4 |
| UTR Pro Tennis Series - Nevada | 2021/06/29 16:30 | Jared Pratt v Aaron Bailey | 7-5,6-3 |
| UTR Pro Tennis Series - Nevada | 2021/06/27 15:00 | Aaron Bailey v Mac Kiger | 6-2,1-0 |
| UTR Pro Tennis Series - Nevada | 2021/06/24 15:00 | Aaron Bailey v Joshua Charlton | 3-6,0-5 |
| UTR Pro Tennis Series - Nevada | 2021/06/23 16:30 | Aaron Bailey v Nicolas Kotzen | 6-7,2-5 |
| UTR Pro Tennis Series - Nevada | 2021/06/22 16:30 | Aaron Bailey v Mason Beiler | 2-6,1-5 |
| UTR Pro Tennis Series - Nevada | 2021/06/21 18:00 | Aaron Bailey v Maxwell McKennon | 7-6,1-6,1-6 |
| Califórnia - UTR Pro Tennis Series | 2021/05/30 15:00 | Spencer Johnson v Aaron Bailey | 6-0,5-4 |
| Califórnia - UTR Pro Tennis Series | 2021/05/29 19:30 | Paul Barretto v Aaron Bailey | 6-7,6-0,4-6 |