| UTR Pro Tennis Series California | 2021/10/16 16:30 | Giacomo Revelli v Isaac Becroft | 6-3,7-6 |
| UTR Pro Tennis Series California | 2021/10/15 16:30 | Giacomo Revelli v Rohan Murali | 6-3,6-3 |
| UTR Pro Tennis Series California | 2021/10/13 16:30 | Giacomo Revelli v William Peters | 0-6,3-6 |
| UTR Pro Tennis Series California | 2021/10/12 21:00 | Giacomo Revelli v Alessandro-D Ventre | 6-4,2-6,7-6 |
| UTR Pro Tennis Series California | 2021/10/11 15:00 | Evan Song v Giacomo Revelli | 6-3,5-3 |
| UTR Pro Tennis Series Portoroz | 2021/08/27 13:30 | Giacomo Revelli v Gal Emersic Potocnik | 6-1,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 10:00 | Giacomo Revelli v Paras Dahiya | 6-4,6-7,6-3 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 07:00 | Robert Rumler v Giacomo Revelli | 3-6,4-6 |
| UTR Pro Tennis Series California | 2021/10/16 16:30 | Karl Lee v Ryan Seggerman | 6-4,3-6,5-3 |
| UTR Pro Tennis Series California | 2021/10/15 16:30 | Yanais Laurent v Karl Lee | 2-6,0-6 |
| UTR Pro Tennis Series California | 2021/10/14 19:30 | JC Aragone 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 | Julien Evrard 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 Nevin Arimilli | 5-7,6-7 |
| UTR Pro Tennis Series Nevada | 2021/07/03 16:30 | Bjorn Swenson v Karl Lee | 6-2,5-2 |