Stadium: Court C Round: 45
| Challenger Drummondville Qual | 2018/03/12 22:55 | Frederik Nielsen v Aleksandar Vukic | 2-6,4-6 |
| Challenger Drummondville Qual | 2018/03/11 17:15 | Frederik Nielsen v Pavel Krainik | View |
| ITF Canada F2 | 2018/03/06 15:00 | Frederik Nielsen v Jared Hiltzik | 4-6,6-4,2-6 |
| ITF Canada F2 Qual | 2018/03/05 14:30 | Frederik Nielsen v Ricardo Rodriguez-Pace | 3-6,6-3,6-4 |
| ITF Canada F2 Qual | 2018/03/04 15:00 | Frederik Nielsen v Luis David Martinez | 6-3,6-4 |
| ITF Canada F1 | 2018/02/27 16:00 | Deiton Baughman v Frederik Nielsen | 6-3,6-3 |
| ITF Great Britain F3 | 2018/02/14 13:40 | Ronnie Schneider v Frederik Nielsen | 6-2,6-4 |
| ITF Great Britain F3 | 2018/02/13 14:55 | Frederik Nielsen v Yannick Jankovits | 6-2,3-6,6-3 |