Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF Sweden F4 | 2018/09/26 15:40 | Konecny, Michal v Johansson, Niklas | 7-5,6-2 |
| ITF Sweden F4 | 2018/09/24 14:20 | Saar, Karl Kiur v Johansson, Niklas | 1-6,2-6 |
| ITF Sweden F4 | 2018/09/23 09:00 | Johansson, Niklas v Arvid Nordquist | 6-4,6-2 |
| ITF Sweden F4 | 2018/09/22 09:00 | Johansson, Niklas v Davidsson, Eric | 6-1,6-2 |
| Istanbul, Turkey | 2018/09/08 10:55 | Khabibulin, Timur v Johansson, Niklas | 6-7,6-1,6-0 |
| ITF Belarus F3 | 2018/08/20 07:30 | Johansson, Niklas v Sarp Agabigun | 3-6,0-6 |
| ITF Belarus F2 | 2018/08/11 08:50 | Johansson, Niklas v Bulitski, Aliaksandr | 5-7,2-6 |
| ITF Belarus F1 | 2018/08/06 07:00 | Mert Alkaya v Johansson, Niklas | 7-6,4-6,6-4 |
| ITF Sweden F2 Qual | 2018/05/13 10:15 | Johansson, Morgan v Ornberg, Anton | 6-3,6-2 |
| ITF Sweden F2 Qual | 2018/05/12 10:30 | Andersson, Oliver v Ornberg, Anton | 5-7,2-6 |
| ITF Sweden F1 Qual | 2018/05/05 08:00 | Ornberg, Anton v Taylor, Sam | 1-6,0-6 |