| UTR Pro Tennis Series Florida | 2021/12/13 20:45 | Noah Schachter v Zapp, Logan | 6-4,7-6 |
| UTR Pro Tennis Series Florida | 2020/12/17 16:00 | Yatsuk, Ivan v Zapp, Logan | 7-6,6-5 |
| UTR Pro Tennis Series Florida | 2020/12/16 14:00 | Zapp, Logan v Ramkumar Ramanathan | 1-6,2-6 |
| UTR Pro Tennis Series Florida | 2020/12/15 15:30 | Alexander Bernard v Zapp, Logan | 6-1,6-1 |
| UTR Pro Tennis Series Florida | 2020/12/14 23:30 | Zapp, Logan v Gabrielius Guzauskas | 6-2,6-3 |
| ITF - M25 Naples | 2020/02/10 15:30 | Zapp, Logan v Adrian Andreev | 3-6,6-7 |
| ITF - M25 Naples | 2020/02/09 15:00 | Lucas Renard v Zapp, Logan | 2-6,3-6 |
| Palm Coast, Singles M-ITF-USA-05A | 2020/02/03 18:00 | Zapp, Logan v Bergevi, Filip | 5-7,2-6 |
| Challenger Knoxville | 2021/11/09 16:25 | Adam Walton v Daniel Altmaier | 3-6,2-6 |
| ITF M15 Champaign | 2021/09/15 21:35 | Adam Walton v Zink, Tyler | 3-6,6-7 |
| UTR Pro Tennis Series Florida | 2021/06/06 13:00 | Adam Walton v Ben Shelton | 7-5,6-3 |
| UTR Pro Tennis Series Florida | 2021/06/05 12:00 | Adam Walton v Joao Ceolin | 6-3,6-2 |
| UTR Pro Tennis Series Florida | 2021/06/04 15:00 | Yatsuk, Ivan v Adam Walton | 6-7,6-7 |
| UTR Pro Tennis Series Florida | 2021/06/03 13:00 | Shi, Brian v Adam Walton | 3-6,1-5 |
| UTR Pro Tennis Series Florida | 2021/06/02 13:00 | Thomas Brown v Adam Walton | 7-6,1-6,1-6 |
| UTR Pro Tennis Series Florida | 2021/05/31 13:00 | Chase Ferguson v Adam Walton | 7-6,2-6,1-5 |