| ITF Spain F18 | 2016/06/21 17:30 | Frederik Nielsen v Roberto Ortega-Olmedo | 4-6,6-1,5-7 |
| ITF Spain F17 | 2016/06/19 09:30 | Remi Boutillier v Frederik Nielsen | 4-6,3-6 |
| ITF Spain F17 | 2016/06/18 16:55 | Frederik Nielsen v Ricardo Ojeda Lara | 6-4,2-6,6-3 |
| ITF Spain F17 | 2016/06/17 13:00 | Miguel Semmler v Frederik Nielsen | 3-6,6-7 |
| ITF Spain F17 | 2016/06/16 16:25 | Javier Barranco Cosano v Frederik Nielsen | 4-6,1-6 |
| ITF Spain F17 | 2016/06/14 14:30 | Jorge Hernando-Ruano v Frederik Nielsen | 4-6,6-7 |
| ITF Israel F6 | 2016/03/24 10:25 | Amir Weintraub v Frederik Nielsen | 6-3,6-4 |
| ITF Israel F6 | 2016/03/23 10:20 | Dmytro Kamynin v Frederik Nielsen | 3-6,6-4,3-6 |
| Davis Cup | 2016/03/06 13:05 | Harri Heliovaara v Courtney John Lock | 6-1,6-0 |
| Davis Cup | 2016/03/04 14:25 | Harri Heliovaara v Takanyi Garanganga | 3-6,6-3,4-6,6-4,6-4 |
| ITF Finland F2 | 2015/08/11 14:15 | Harri Heliovaara v Casper Ruud | 6-2,3-6,7-6 |
| ITF Finland F1 | 2015/08/07 09:50 | Harri Heliovaara v Alexander Vasilenko | 5-7,5-7 |
| ITF Finland F1 | 2015/08/05 11:10 | Cristobal Grandon Diaz v Harri Heliovaara | 1-6,2-6 |
| ITF Finland F1 | 2015/08/04 11:50 | Herkko Pollanen v Harri Heliovaara | 1-6,6-2,5-7 |
| Challenger Tampere | 2015/07/23 11:30 | Harri Heliovaara v Jurgen Zopp | 6-7,3-6 |
| Challenger Tampere | 2015/07/21 11:00 | Harri Heliovaara v Frederico Ferreira Silva | 6-3,7-5 |