| UTR Pro Tennis Series California | 2021/10/15 16:30 | 라오렌트, 야나이스 v Karl Lee | 2-6,0-6 |
| UTR Pro Tennis Series California | 2021/10/14 19:30 | 아라곤, JC v Karl Lee | 7-5,6-3 |
| UTR Pro Tennis Series California | 2021/10/13 16:30 | Rithvik Krishna v Karl Lee | 3-6,3-5 |
| UTR Pro Tennis Series California | 2021/10/11 16:30 | 에브라드, 줄리엔 v Karl Lee | 4-6,4-5 |
| UTR Pro Tennis Series California | 2021/07/20 15:00 | Karl Lee v Julian Steinhausen | 3-6,6-7 |
| UTR Pro Tennis Series California | 2021/07/18 22:47 | Karl Lee v 아리밀리, 네빈 | 5-7,6-7 |
| UTR Pro Tennis Series Nevada | 2021/07/03 16:30 | Bjorn Swenson v Karl Lee | 6-2,5-2 |
| UTR Pro Tennis Series Nevada | 2021/06/30 15:00 | Karl Lee v Bailey, Aaron | 6-2,6-4 |
| UTR Pro Tennis Series California | 2021/10/15 18:00 | Seggerman, Ryan v Chase Thompson | 6-4,6-2 |
| UTR Pro Tennis Series California | 2021/10/13 19:30 | Seggerman, Ryan v van Wyk, Kris | 3-6,6-3,5-3 |
| UTR Pro Tennis Series California | 2021/10/12 18:00 | Seggerman, Ryan v Alex Michelsen | 4-6,6-4,3-5 |
| UTR Pro Tennis Series California | 2021/10/11 19:30 | Campbell, Nicholas v Seggerman, Ryan | 7-6,2-6,6-2 |
| UTR Pro Tennis Series Sacramento | 2021/10/10 17:30 | Seggerman, Ryan v Tomas Kopczynski | 6-3,4-1 |
| UTR Pro Tennis Series Sacramento | 2021/10/09 18:00 | Seggerman, Ryan v Suraj Prabodh | 6-2,5-3 |
| UTR Pro Tennis Series Sacramento | 2021/10/08 21:00 | 알칸타라, 프란시스 카세이 v Seggerman, Ryan | 7-6,6-6 |
| UTR Pro Tennis Series Sacramento | 2021/10/07 19:30 | Jeremy Field v Seggerman, Ryan | 5-7,4-5 |