Stadium: Center Court Round: 46
| Challenger Stockton | 2018/09/29 20:30 | Harri Heliovaara v Ruan Roelofse | 7-6,6-1 |
| Challenger Tiburon | 2018/09/22 21:55 | Renzo Olivo v Harri Heliovaara | 6-2,3-6,7-6 |
| Davis Cup | 2018/09/15 09:40 | Mohamed Safwat v Harri Heliovaara | 6-2,6-4 |
| Davis Cup | 2018/09/14 11:25 | Karim-Mohamed Maamoun v Harri Heliovaara | 3-6,2-6 |
| ITF Switzerland F5 | 2018/09/07 11:00 | Harri Heliovaara v Louis Wessels | 6-1,4-6,1-6 |
| ITF Switzerland F5 | 2018/09/06 11:00 | Harri Heliovaara v Alexander Ritschard | 7-6,6-2 |
| ITF Switzerland F5 | 2018/09/05 12:40 | Harri Heliovaara v Florian Fallert | 4-6,6-3,6-3 |
| ITF Switzerland F5 | 2018/09/03 15:45 | Harri Heliovaara v Adrien Bossel | 6-3,6-0 |
| Challenger Stockton | 2018/09/29 19:20 | Sebastian Korda v Sem Verbeek | 6-3,5-7,3-6 |
| ITF Portugal F16 | 2018/08/25 09:00 | Fred Gil v Sem Verbeek | 6-1,6-2 |
| ITF Portugal F16 | 2018/08/24 09:00 | Sem Verbeek v Jonathan Binding | 7-6,6-4 |
| ITF Portugal F16 | 2018/08/23 09:00 | Niels Desein v Sem Verbeek | 2-6,6-7 |
| ITF Portugal F16 | 2018/08/22 11:10 | Simao Alves v Sem Verbeek | 2-6,0-6 |
| Challenger Cordenons | 2018/08/11 10:15 | Walter Trusendi v Sem Verbeek | 6-1,6-2 |
| Challenger Winnipeg Qual | 2018/07/08 23:00 | Sem Verbeek v Marc-Andrea Huesler | 6-7,4-6 |
| Challenger Winnipeg Qual | 2018/07/08 18:05 | Sem Verbeek v Jumpei Yamasaki | 7-6,7-6 |