Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Jinan | 2018/08/07 07:30 | Ramkumar Ramanathan v Harri Heliovaara | 3-6,4-6 |
| Challenger Chengdu | 2018/07/31 04:35 | Akira Santillan v Harri Heliovaara | 6-7,7-5,7-6 |
| Challenger Tampere | 2018/07/24 16:00 | Harri Heliovaara v Antoine Hoang | 0-6,4-6 |
| ITF Netherlands F2 | 2018/07/07 16:05 | Harri Heliovaara v Jelle Sels | 6-4,4-6,4-6 |
| ITF Netherlands F2 | 2018/07/06 12:15 | Harri Heliovaara v Denis Klok | 3-1 |
| 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 Jinan | 2018/08/06 07:30 | Danilo Petrovic v Denis Yevseyev | 4-6,2-6 |
| Challenger Chengdu | 2018/08/03 03:00 | Denis Yevseyev v Akira Santillan | 5-7,2-6 |
| Challenger Chengdu | 2018/08/01 08:50 | Alexei Popyrin v Denis Yevseyev | 1-6,6-7 |
| Challenger Chengdu | 2018/07/30 03:00 | Denis Yevseyev v Maverick Banes | 7-5,6-1 |
| Challenger Astana | 2018/07/18 06:30 | Maxime Janvier v Denis Yevseyev | 4-6,7-5,6-3 |
| Challenger Astana | 2018/07/17 05:20 | Denis Yevseyev v Roman Safiullin | 4-6,6-3,6-4 |
| ITF Spain F17 | 2018/07/06 13:00 | Denis Yevseyev v Roberto Ortega-Olmedo | 4-6,2-6 |
| ITF Spain F17 | 2018/07/06 08:00 | Denis Yevseyev v Alberto Barroso Campos | 6-0,6-1 |