| UTR Pro Tennis Series New York | 2021/12/30 17:30 | Mac Kiger v Liam Krall | 1-6,6-2,4-6 |
| UTR Pro Tennis Series New York | 2021/12/29 20:30 | Roy Smith v Mac Kiger | 6-4,6-3 |
| UTR Pro Tennis Series New York | 2021/12/28 19:00 | Nicholas Steiglehner v Mac Kiger | 6-4,1-6,5-3 |
| UTR Pro Tennis Series Dallas | 2021/08/08 13:00 | William Grant v Mac Kiger | 6-4,6-5 |
| UTR Pro Tennis Series Dallas | 2021/08/07 17:30 | Mac Kiger v A.J Catanzariti | 7-5,1-6,5-3 |
| UTR Pro Tennis Series Dallas | 2021/08/06 14:30 | Elijah Poritzky v Mac Kiger | 3-6,5-7 |
| UTR Pro Tennis Series Dallas | 2021/08/05 17:30 | Lawrence Sciglitano v Mac Kiger | 0-0 |
| UTR Pro Tennis Series Dallas | 2021/08/04 16:00 | Eric Hadigian v Mac Kiger | 5-7,6-4,5-7 |
| UTR Pro Tennis Series New York | 2021/12/30 22:50 | Roy Smith v Brian Shi | 6-3,4-6,6-7 |
| UTR Pro Tennis Series New York | 2021/12/29 16:00 | Nicholas Steiglehner v Brian Shi | 2-6,3-5 |
| UTR Pro Tennis Series New York | 2021/12/27 22:30 | Liam Krall v Brian Shi | 2-6,2-6 |
| UTR Pro Tennis Series Florida | 2021/06/05 13:30 | Brian Shi v Andrew Rogers | 6-3,4-6,3-6 |
| UTR Pro Tennis Series Florida | 2021/06/03 13:00 | Brian Shi v Adam Walton | 3-6,1-5 |
| UTR Pro Tennis Series Florida | 2021/06/02 13:00 | Brian Shi v Ivan Yatsuk | 6-2,3-6,3-6 |
| UTR Pro Tennis Series Florida | 2021/06/01 17:30 | Brian Shi v Chase Ferguson | 6-1,5-4 |
| UTR Pro Tennis Series Florida | 2021/05/31 13:00 | Brian Shi v Thomas Brown | 6-2,6-3 |