Stadium: Court 4 Round: 27 Ground: Clay
| ITF Netherlands F2 | 2018/07/05 08:00 | Harri Heliovaara v Stephan Gerritsen | 6-2,7-5 |
| ITF Netherlands F2 | 2018/07/04 08:00 | Harri Heliovaara v Kevin Kaczynski | 6-3,6-1 |
| Challenger Blois | 2018/06/21 09:00 | Pedro Cachin v Harri Heliovaara | 6-7,7-6,6-2 |
| Challenger Blois | 2018/06/19 16:00 | Frederico Ferreira Silva v Harri Heliovaara | 6-3,5-7,6-7 |
| Challenger Blois Qual | 2018/06/18 10:15 | Harri Heliovaara v Tristan Lamasine | 4-6,4-6 |
| Challenger Blois Qual | 2018/06/17 13:55 | Harri Heliovaara v Romain Arneodo | 4-6,7-6,7-6 |
| Challenger Blois Qual | 2018/06/16 15:45 | Harri Heliovaara v Hans Hach Verdugo | 6-1,6-4 |
| Challenger Lyon Qual | 2018/06/09 14:00 | Matteo Martineau v Harri Heliovaara | 6-4,6-1 |
| ITF Netherlands F2 | 2018/07/05 11:20 | Denis Klok v Michiel de Krom | 7-6,4-6,7-5 |
| ITF Netherlands F2 | 2018/07/03 12:40 | Denis Klok v Stephan Fransen | 6-3,6-3 |
| ITF Germany F5 | 2018/06/27 16:00 | Denis Klok v Marvin Netuschil | 3-6,3-6 |
| ITF Hungary F4 Qual | 2018/06/10 08:00 | Denis Klok v Strahinja Rakic | 2-6,1-6 |
| ITF Hungary F3 | 2018/05/24 08:30 | Denis Klok v Marko Tepavac | 4-6,1-6 |
| ITF Hungary F3 | 2018/05/23 12:05 | Denis Klok v Fabian Marozsan | 6-7,7-6,7-6 |
| ITF Hungary F3 | 2018/05/22 09:40 | Denis Klok v Andre Biro | 6-3,6-4 |
| ITF Hungary F2 | 2018/05/18 08:00 | Kenneth Raisma v Denis Klok | 6-4,6-4 |