stadio: Centre Court Round: 54
| Challenger Loughborough - Qual. | 2018/05/20 09:30 | Viktor Durasovic v Johannes Haerteis | 6-7,5-7 |
| Challenger Loughborough - Qual. | 2018/05/19 11:10 | Johannes Haerteis v Sean Hodkin | 6-3,6-7,6-4 |
| ITF Israele F6 | 2018/05/11 07:30 | Johannes Haerteis v Matias Franco Descotte | 2-6,4-6 |
| ITF Israele F6 | 2018/05/08 11:30 | Johannes Haerteis v Uri Vodavoz | 6-0,6-1 |
| ITF Israele F5 | 2018/05/04 07:30 | Johannes Haerteis v Matias Franco Descotte | 3-6,2-6 |
| ITF Israele F5 | 2018/05/03 07:30 | Nicolas Uryson v Johannes Haerteis | 6-7,1-6 |
| ITF Israele F5 | 2018/05/01 07:00 | Jordan Hasson v Johannes Haerteis | 5-7,4-6 |
| ITF Israele F4 | 2018/04/25 10:00 | Johannes Haerteis v Patrik Niklas-Salminen | 4-6,7-6,4-6 |
| Challenger Loughborough - Qual. | 2018/05/20 09:30 | Simon Carr v Frederik Nielsen | 3-6,4-6 |
| Challenger Loughborough - Qual. | 2018/05/19 09:00 | Remi Boutillier v Frederik Nielsen | 7-6,6-7,1-6 |
| Challenger Busan - Qual. | 2018/05/14 03:30 | Yosuke Watanuki v Frederik Nielsen | 1-6,6-4,6-0 |
| Challenger Busan - Qual. | 2018/05/13 04:10 | Frederik Nielsen v Wishaya Trongcharoenchaikul | 6-7,6-4,6-0 |
| Challenger Seoul - Qual. | 2018/04/28 04:30 | Yong-Kyu Lim v Frederik Nielsen | 6-4,6-1 |
| Coppa Davis | 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 |