| ITF M15 Vero Beach | 2021/10/20 17:50 | 존슨, 잔마그누스 v 클라크, 에제키엘 | 5-7,7-5,2-6 |
| Vero Beach, Fl, Singles Qualifying M-ITF-USA-17A | 2021/10/19 16:00 | 데 로시, 마르코 v 존슨, 잔마그누스 | 2-6,1-6 |
| Vero Beach, Fl, Singles Qualifying M-ITF-USA-17A | 2021/10/18 16:00 | 오버미어, 카일 v 존슨, 잔마그누스 | 1-6,0-6 |
| UTR Pro Tennis Series Florida | 2021/01/15 15:30 | 메이, 메사 v 존슨, 잔마그누스 | 6-1,3-6,5-3 |
| UTR Pro Tennis Series Florida | 2021/01/14 16:00 | 존슨, 잔마그누스 v Scott, Fletcher | 3-6,6-1,6-2 |
| UTR Pro Tennis Series Florida | 2021/01/11 20:00 | 존슨, 잔마그누스 v Bruno Kuzuhara | 6-4,4-6,6-7 |
| UTR Pro Tennis Series Florida | 2021/01/10 18:00 | 존슨, 잔마그누스 v Zlobinsky, Julian | 6-2,5-0 |
| UTR Pro Tennis Series Florida | 2020/12/17 18:00 | 존슨, 잔마그누스 v 킹슬레이, 캐논 | 5-7,4-6 |
| UTR Pro Tennis Series Florida | 2021/12/19 17:00 | Ross, Matthis v Juan David Velasquez | 6-2,5-1 |
| UTR Pro Tennis Series Florida | 2021/12/17 15:30 | Ross, Matthis v 홀트, 브란던 | 0-6,1-6 |
| UTR Pro Tennis Series Florida | 2021/12/16 14:00 | Ross, Matthis v 아주마, 리우헤이 | 2-6,6-2,2-5 |
| UTR Pro Tennis Series Florida | 2021/12/15 17:30 | 후드, 에밀 v Ross, Matthis | 6-3,6-4 |
| UTR Pro Tennis Series Florida | 2021/12/15 14:00 | Matthew Thomson v Ross, Matthis | 6-2,6-4 |
| UTR Pro Tennis Series Texas | 2021/09/26 13:00 | Anish Sriniketh v Ross, Matthis | 6-7,3-6 |
| UTR Pro Tennis Series Texas | 2021/09/25 19:00 | Ross, Matthis v Marson, Guido | 6-3,0-6,6-4 |
| UTR Pro Tennis Series Texas | 2021/09/24 17:30 | Grant Lothringer v Ross, Matthis | 4-6,1-5 |