Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF South Africa F3 Qual | 2017/12/02 13:25 | Jesper De Jong v Ilco Van Buuren | 6-2,6-1 |
| ITF South Africa F2 Qual | 2017/11/26 12:05 | Ilco Van Buuren v Jesper De Jong | 2-6,3-6 |
| ITF South Africa F2 Qual | 2017/11/25 08:10 | Rikhardt Bierman v Ilco Van Buuren | 0-6,6-4,2-6 |
| ITF Netherlands F5 | 2017/08/16 12:55 | Ilco Van Buuren v Jelle Sels | 4-6,2-6 |
| ITF Belgium F5 | 2017/07/15 07:00 | Ilco Van Buuren v Daniel De Jonge | 7-5,6-4 |
| ITF Netherlands F4 | 2017/07/08 08:00 | Ilco Van Buuren v Tim Sandkaulen | 6-2,6-7,2-6 |
| ITF Netherlands F3 | 2017/07/04 15:20 | Ilco Van Buuren v Evan King | 0-6,5-7 |
| ITF Netherlands F2 Qual | 2017/06/25 09:00 | Bobbie De Goeijen v Ilco Van Buuren | 6-4,6-2 |
| ITF Egypt F1 | 2018/01/15 10:00 | Johannes Haerteis v Fabian Marozsan | 2-6,4-6 |
| ITF Egypt F1 | 2018/01/14 08:00 | Johannes Haerteis v Jannik Sinner | 6-3,5-7,7-5 |
| Challenger Eckental Qual | 2017/10/28 09:00 | Evan Furness v Johannes Haerteis | 3-6,7-6,7-6 |
| ITF Czech Republic F7 | 2017/10/25 08:00 | Danylo Kalenichenko v Johannes Haerteis | 6-4,6-2 |
| ITF Germany F15 | 2017/10/16 10:00 | Johannes Haerteis v Ingo Herzgerodt | 6-4,6-3 |
| ITF Germany F15 | 2017/10/16 10:00 | Johannes Haerteis v Robert Carter | 7-6,1-6,0-6 |
| ITF Germany F14 | 2017/10/11 16:00 | Daniel Masur v Johannes Haerteis | 7-6,6-3 |
| ITF Germany F14 | 2017/10/09 10:00 | Johannes Haerteis v Sven Lemstra | 6-3,6-1 |