Estádio: Court 4 Round: 166 Ground: Hardcourt outdoor
| Challenger - Kobe | 2019/11/04 06:30 | Ryota Tanuma v Takuto Niki | 6-3,4-6,7-6 |
| Challenger - Liuzhou | 2019/10/21 06:00 | Yunseong Chung v Takuto Niki | 6-2,7-6 |
| ITF - M15 Changwon | 2019/10/16 04:50 | Ryohei Tagata v Takuto Niki | 7-5,2-6,6-4 |
| ITF - M15 Fayetteville | 2019/09/20 19:30 | Takuto Niki v Oscar Mesquida Berg | 7-6,3-6,6-4 |
| ITF - M15 Fayetteville | 2019/09/19 14:00 | Takuto Niki v Eduardo Nava | 7-5,7-5 |
| ITF - M15 Fayetteville | 2019/09/18 14:00 | Takuto Niki v Ryan Goetz | 7-5,6-4 |
| ITF - M15 Champaign | 2019/09/11 16:00 | Takuto Niki v Matheus P De Almeida | 1-6,5-7 |
| ITF - M15 Sajur | 2019/09/05 07:50 | Yair Sarouk v Takuto Niki | 7-5,6-3 |
| Challenger - Helsínquia | 2019/11/15 14:00 | Harri Heliovaara v Ilya Ivashka | 6-3,1-6,2-6 |
| Challenger - Helsínquia | 2019/11/14 11:00 | Hugo Grenier v Harri Heliovaara | 1-6,3-6 |
| Challenger - Helsínquia | 2019/11/13 11:00 | Harri Heliovaara v Hiroki Moriya | 4-6,7-6,6-3 |
| Challenger - Helsínquia | 2019/11/11 16:10 | Artem Dubrivnyy v Harri Heliovaara | 3-6,2-6 |
| Challenger Playford 2 | 2019/10/30 23:30 | Jay Clarke v Harri Heliovaara | 6-4,6-3 |
| Challenger Playford 2 | 2019/10/29 23:30 | Harri Heliovaara v Mukund Sasikumar | 7-6,6-3 |
| Challenger Playford 2 | 2019/10/28 23:30 | James Ibrahim v Harri Heliovaara | 1-6,2-6 |
| Challenger - Traralgon | 2019/10/23 03:00 | Harri Heliovaara v James Duckworth | 4-6,2-6 |