Stadium: Court 1 Round: 46 Ground: Hardcourt outdoor
| Davis Cup | 2018/04/07 10:00 | Frederik Nielsen v Karim-Mohamed Maamoun | 6-3,3-6,6-7 |
| Challenger Segovia Qual | 2018/07/28 12:20 | Karim-Mohamed Maamoun v Jonathan Kanar | 6-3,6-4 |
| Challenger Padova Qual | 2018/07/21 15:00 | Karim-Mohamed Maamoun v Agustin Velotti | 6-7,4-6 |
| ITF Nigeria F3 | 2018/05/03 10:15 | Moez Echargui v Karim-Mohamed Maamoun | 6-3,7-6 |
| ITF Nigeria F3 | 2018/05/02 11:10 | Tom Jomby v Karim-Mohamed Maamoun | 4-6,1-6 |
| ITF Nigeria F3 | 2018/05/01 09:00 | Kazuma Kawachi v Karim-Mohamed Maamoun | 4-6,2-6 |
| ITF Nigeria F2 | 2018/04/24 11:00 | Karim-Mohamed Maamoun v Joao Menezes | 3-6,0-6 |
| Davis Cup | 2018/04/07 10:00 | Frederik Nielsen v Karim-Mohamed Maamoun | 6-3,3-6,6-7 |
| ITF Portugal F6 | 2018/03/29 14:40 | Karim-Mohamed Maamoun v Robin Stanek | 6-7,1-6 |
| Challenger Segovia Qual | 2018/07/28 12:45 | Alexander Zhurbin v Frederik Nielsen | 2-6,3-6 |
| Challenger Nottingham | 2018/06/12 15:55 | Adrian Menendez-Maceiras v Frederik Nielsen | 6-4,7-6 |
| Challenger Nottingham - Kval | 2018/06/11 10:00 | Dominik Koepfer v Frederik Nielsen | 6-1,4-6,1-6 |
| Challenger Nottingham - Kval | 2018/06/10 12:25 | Frederik Nielsen v Austin Krajicek | 6-3,7-6 |
| Challenger Nottingham - Kval | 2018/06/09 16:45 | Frederik Nielsen v Daniil Zarichanskiy | 6-3,6-1 |
| Challenger Loughborough | 2018/05/22 12:30 | Frederik Nielsen v David Guez | 2-6,4-6 |
| Challenger Loughborough Qual | 2018/05/21 09:30 | Johannes Haerteis v Frederik Nielsen | 6-7,1-6 |
| Challenger Loughborough Qual | 2018/05/20 09:30 | Simon Carr v Frederik Nielsen | 3-6,4-6 |