Stadium: Show Court 1 Round: 24 Ground: Hardcourt outdoor
| Challenger Chengdu | 2019/07/31 03:25 | Tung-Lin Wu v Harri Heliovaara | 6-3,6-7,2-6 |
| Challenger Chengdu | 2019/07/30 02:00 | Harri Heliovaara v Courtney John Lock | 6-3,6-2 |
| Challenger Tampere | 2019/07/23 13:05 | Ivan Nedelko v Harri Heliovaara | 6-4,3-6,6-1 |
| Challenger Columbus | 2019/06/10 22:55 | Zhizhen Zhang v Harri Heliovaara | 6-3,6-4 |
| Challenger Sarasota | 2019/04/16 14:00 | Harri Heliovaara v Guilherme Clezar | 2-6,4-6 |
| Challenger Sarasota | 2019/04/15 14:00 | Harri Heliovaara v Johannes Haerteis | 6-3,6-2 |
| Challenger Zhangjiagang | 2019/03/19 03:05 | Guilherme Clezar v Harri Heliovaara | 7-6,6-3 |
| Challenger Zhangjiagang | 2019/03/18 02:00 | Harri Heliovaara v Luca Margaroli | 2-6,6-3,6-1 |
| ITF Guam F1 | 2018/06/17 00:00 | Yasunori Hashikawa v Worarin Kumthonkittikul | 1-6,5-7 |
| ITF Guam F1 | 2018/06/16 00:00 | Douglas Geiwald v Yasunori Hashikawa | 1-6,1-6 |
| ITF Japan F8 | 2018/06/09 01:00 | Yasunori Hashikawa v Masayoshi Ono | 6-2,4-6,4-6 |
| ITF Japan F4 | 2018/03/24 00:00 | Wei-De Lin v Yasunori Hashikawa | 6-2,6-2 |
| ITF Japan F3 | 2018/03/17 00:30 | Yasunori Hashikawa v Naoya Maesaki | 4-6,4-6 |
| ITF Japan F2 | 2018/03/11 00:30 | Issei Okamura v Yasunori Hashikawa | 6-2,6-1 |
| ITF Japan F1 | 2018/03/04 01:00 | Jack Murray v Yasunori Hashikawa | 6-2,6-2 |
| ITF Japan F1 | 2018/03/03 01:00 | Yasunori Hashikawa v Kenta Kurita | 6-2,6-4 |