Round: 54 Ground: Clay
| ITF Sweden F5 | 2018/10/02 13:25 | Strom, Gustaf v Slavic, Nikola | 6-4,6-4 |
| ITF Sweden F5 | 2018/09/30 08:00 | Lucas Renard v Slavic, Nikola | 4-6,2-6 |
| ITF Sweden F5 | 2018/09/29 08:00 | Slavic, Nikola v Andersson, Oliver | 6-3,6-4 |
| ITF Sweden F4 | 2018/09/22 13:00 | Slavic, Nikola v Yitbarek, Simon | 3-6,1-6 |
| ITF Slovakia F2 | 2018/07/29 13:00 | Slavic, Nikola v Kandath, Matthew | 6-1,2-6,2-6 |
| ITF Germany F5 | 2018/06/25 08:00 | Terczynski, Mateusz v Slavic, Nikola | 6-1,7-6 |
| Turkey F14, Singles Qualifying | 2018/04/07 07:30 | Slavic, Nikola v Valentin Vanta | 0-6,3-6 |
| ITF Greece F2 | 2018/03/03 07:30 | Slavic, Nikola v Summaria, Corrado | 3-6,3-6 |
| ITF Latvia F1 | 2018/07/28 07:00 | Bruna, Esteban v Lukstins, Gustavs | 6-4,6-1 |
| ITF Lithuania F1 | 2018/07/21 07:00 | Lukstins, Gustavs v Grinvalds, Roberts | 5-7,0-6 |
| ITF Estonia F1 | 2018/07/14 08:00 | Lukstins, Gustavs v Mednis, Rudolfs | 6-7,2-6 |
| ITF Belgium F3 Qual | 2018/07/01 12:00 | Lukstins, Gustavs v Taylor, Sam | 6-7,2-6 |
| Turkey F6, Singles Qualifying | 2018/02/10 09:00 | Lukstins, Gustavs v Ryuki Matsuda | 0-6,1-6 |
| ITF Turkey F3 | 2018/01/22 10:00 | Haylaz, Muhammet v Lukstins, Gustavs | 6-1,7-5 |
| ITF Turkey F3 | 2018/01/20 07:00 | Lukstins, Gustavs v Amir Hossein Badi | 6-3,2-6,6-2 |
| ITF Estonia F4 | 2017/11/04 11:00 | Maiga, Riccardo v Lukstins, Gustavs | 7-5,6-2 |