Stadium: Court 3 Round: 54
| Challenger Stockton | 2018/09/30 19:35 | Harri Heliovaara v Sem Verbeek | 6-1,6-4 |
| 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 |
| Challenger Stockton | 2018/09/30 20:35 | Henry Craig v Alexander Sarkissian | 2-6,2-6 |
| Challenger Stockton | 2018/09/29 18:50 | Sebastian Fanselow v Alexander Sarkissian | 6-7,3-6 |
| Challenger Tiburon | 2018/09/25 21:15 | Alexander Sarkissian v James Duckworth | 6-7,4-6 |
| Challenger Tiburon | 2018/09/24 18:55 | Alexander Sarkissian v Pablo Vivero Gonzalez | 6-3,6-7,6-2 |
| Challenger Tiburon | 2018/09/23 19:20 | Mitchell Krueger v Alexander Sarkissian | 2-6,4-6 |
| Challenger Tiburon | 2018/09/22 18:15 | Frederik Nielsen v Alexander Sarkissian | 4-6,5-7 |
| Challenger Cary | 2018/09/10 18:00 | Alexander Sarkissian v Joris De Loore | 4-6,4-6 |
| Challenger Cary | 2018/09/09 14:00 | Alexander Sarkissian v Ronnie Schneider | 6-2,2-6,6-3 |