| UTR Pro Tennis Series Florida | 2021/12/13 14:00 | Connor Krug v Martim L Prata | 6-3,3-6,3-6 |
| UTR Pro Tennis Series Atlanta | 2021/07/08 14:30 | Jacob Bickersteth v Connor Krug | 6-2,6-3 |
| UTR Pro Tennis Series Atlanta | 2021/07/07 12:00 | Connor Krug v William Cooksey | 2-6,6-7 |
| UTR Pro Tennis Series Atlanta | 2021/07/06 13:30 | Connor Krug v Dane Sweeny | 3-6,1-5 |
| UTR Pro Tennis Series Atlanta | 2021/07/04 13:30 | John Bernard v Connor Krug | 3-6,6-3,2-6 |
| UTR Pro Tennis Series Atlanta | 2021/04/10 14:00 | Connor Krug v Adit Sinha | 5-7,1-5 |
| UTR Pro Tennis Series Atlanta | 2021/04/08 14:00 | Connor Krug v Hunter Reese | 2-6,4-6 |
| UTR Pro Tennis Series Atlanta | 2021/04/07 14:00 | Connor Krug v Kiranpal Pannu | 5-7,6-4,6-7 |
| UTR Pro Tennis Series Florida | 2021/12/13 19:30 | Oskar Brostrom Poulsen v Francois Musitelli | 2-6,3-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/15 09:30 | Alejandro Mendoza v Oskar Brostrom Poulsen | 5-2 |
| UTR Pro Tennis Series Copenhagen | 2021/06/14 11:00 | Oskar Brostrom Poulsen v Jesper Klov Nilsson | 3-6,3-6 |