| Sydney, Australia | 01/10 00:00 | 19 | [64] Heliovaara, Harri v Viktor Durasovic [345] | 4-6,6-3,4-6 | |
| Sydney, Australia | 01/09 01:30 | 14 | Heliovaara, Harri v Rubin Statham | 7-6,7-6 | |
| ATP - Adelaïde | 01/02 05:45 | 14 | [64] Heliovaara, Harri v Francisco Cerundolo [127] | 4-6,2-6 | |
| ATP - Los Cabos | 07/18 01:20 | 14 | [237] Ebden, Matthew v Heliovaara, Harri [77] | 6-2,6-2 | |
| Challenger Gran Canaria Qual | 02/28 13:00 | 14 | [97] Heliovaara, Harri v Esteve Lobato, Eduard [483] | 2-6,4-6 | |
| Antalya, Turquie | 01/07 09:20 | 19 | [269] Pavel Kotov v Heliovaara, Harri [111] | 6-2,6-2 | |
| Antalya, Turquie | 01/06 11:55 | 168 | [111] Heliovaara, Harri v Sasikumar Mukund [300] | 6-4,7-5 | |
| Challenger Maia | 11/28 15:40 | 64 | [114] Heliovaara, Harri v Nikolas S Izquierdo [356] | 2-6,4-6 | |
| Coupe Davis | 03/07 18:10 | 45 | Lopez Villasenor, Gerardo v Heliovaara, Harri | 6-0,7-6 | |
| Challenger Calgary | 02/25 17:00 | 24 | [305] Shintaro Imai v Heliovaara, Harri [142] | 6-0,6-2 | |
| Challenger Calgary | 02/24 16:00 | 166 | Felix Corwin v Heliovaara, Harri | 7-6,6-2 | |
| Drummondville, Canada | 02/17 17:55 | - | Haerteis, Johannes v Heliovaara, Harri | Cancelled | |
| Challenger Launceston | 02/03 23:00 | 24 | [136] Heliovaara, Harri v Pervolarakis, Michail [427] | 3-6,3-6 | |
| Challenger - Burnie | 01/26 23:00 | 166 | Niki, Takuto v Heliovaara, Harri | 6-4,1-6,7-6 | |
| Helsinki, Finland | 11/15 14:00 | 27 | [154] Heliovaara, Harri v Ilya Ivashka [138] | 6-3,1-6,2-6 | |
| Helsinki, Finland | 11/14 11:00 | 26 | [302] Hugo Grenier v Heliovaara, Harri [154] | 1-6,3-6 | |
| Helsinki, Finland | 11/13 11:00 | 25 | [154] Heliovaara, Harri v Hiroki Moriya [207] | 4-6,7-6,6-3 | |
| Helsinki, Finland | 11/11 16:10 | 24 | [396] Dubrivnyy, Artem v Heliovaara, Harri [154] | 3-6,2-6 | |
| Playford City II, Australie | 10/30 23:30 | 26 | [190] Jay Clarke v Heliovaara, Harri [151] | 6-4,6-3 | |
| Playford City II, Australie | 10/29 23:30 | 25 | [151] Heliovaara, Harri v Sasikumar Mukund [235] | 7-6,6-3 | |
| Playford City II, Australie | 10/28 23:30 | 24 | Ibrahim, James v Heliovaara, Harri | 1-6,2-6 | |
| Challenger Traralgon | 10/23 03:00 | 25 | [150] Heliovaara, Harri v James Duckworth [133] | 4-6,2-6 | |
| Challenger Traralgon | 10/22 04:30 | 24 | Addison, Aaron v Heliovaara, Harri | 3-6,0-6 | |
| Challenger - Glasgow | 09/16 15:55 | 24 | [153] Heliovaara, Harri v Geoffrey Blancaneaux [322] | 2-6,6-3,3-6 | |
| Coupe Davis | 09/14 14:45 | - | [147] Heliovaara, Harri v Dennis Novak [122] | 6-3,3-6,6-7 | |
| Challenger Cassis | 09/03 15:30 | 25 | [65] Tsonga, Jo-Wilfried v Heliovaara, Harri [151] | 6-4,6-3 | |
| Challenger Cassis | 09/02 11:20 | 24 | [151] Heliovaara, Harri v Felipe M R Alves [387] | 6-4,7-6 | |
| Challenger Mallorca | 08/26 09:00 | 24 | [151] Heliovaara, Harri v Thiago Seyboth Wild [337] | 4-6,4-6 | |
| Challenger Yokkaichi | 08/05 06:30 | 24 | Heliovaara, Harri v Hashikawa, Yasunori | Cancelled | |
| Chengdu, China | 08/01 03:00 | 26 | [474] Heliovaara, Harri v Sugita, Yuichi [197] | Retired |