| Davis Cup | 2018/04/07 10:00 | Frederik Nielsen v Karim-Mohamed Maamoun | 6-3,3-6,6-7 |
| 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 |
| Davis Cup | 2018/04/07 12:55 | Christoffer Konigsfeldt v Youssef Hossam | 4-6,4-6 |
| ITF Portugal F6 | 2018/03/28 10:40 | Youssef Hossam v Andres Artunedo Martinavarr | 4-6,6-2,6-7 |
| ITF Portugal F6 | 2018/03/27 12:00 | Youssef Hossam v Daniel Brands | 6-3,6-4 |
| ITF Portugal F5 Qual | 2018/03/24 16:30 | Youssef Hossam v Roberto Ortega-Olmedo | 6-2,2-6,4-6 |
| ITF Portugal F5 Qual | 2018/03/24 12:30 | Pablo Vivero Gonzalez v Youssef Hossam | 0-6,7-5,3-6 |
| ITF Portugal F5 Qual | 2018/03/22 13:00 | Daniel Brands v Youssef Hossam | 4-6,4-6 |
| ITF Portugal F5 Qual | 2018/03/21 11:40 | Goncalo Falcao v Youssef Hossam | 4-6,6-3,0-6 |
| ITF Egypt F9 | 2018/03/15 09:55 | Wilfredo Gonzalez v Youssef Hossam | 6-7,4-6 |