Stadium: Court 1 Round: 45 Ground: Clay
| ITF Estonia F1 | 2018/07/17 07:00 | Emil Ruusuvuori v Kristjan Tamm | 6-3,5-7,6-3 |
| ITF Italy F15 | 2018/06/17 09:35 | Vazha Shubladze v Kristjan Tamm | 4-6,2-6 |
| ITF Hungary F4 Qual | 2018/06/11 08:00 | Ken Onishi v Kristjan Tamm | 6-3,2-6,6-3 |
| ITF Hungary F4 Qual | 2018/06/10 08:00 | Filip Kucbel v Kristjan Tamm | 2-6,5-7 |
| ITF Italy F13 | 2018/06/04 07:30 | Tommaso Roggero v Kristjan Tamm | 6-2,6-3 |
| ITF Italy F13 | 2018/06/03 08:00 | Guillaume Dermiens v Kristjan Tamm | 1-6,4-6 |
| ITF Turkey F18 | 2018/05/08 07:30 | Kristjan Tamm v Alexander Weis | 5-7,0-6 |
| ITF Turkey F17 | 2018/04/29 07:30 | Kristjan Tamm v Cristian Florentin Voinea | 3-6,6-4,4-6 |
| ATP Umag Qual | 2018/07/15 10:00 | Alexey Vatutin v Nik Razborsek | 6-2,6-3 |
| ITF Italy F14 | 2018/06/16 14:00 | Nik Razborsek v Riccardo Bellotti | 4-6,3-6 |
| ITF Italy F14 | 2018/06/15 14:30 | Nik Razborsek v Jacopo Berrettini | 6-4,6-4 |
| ITF Italy F14 | 2018/06/14 16:00 | Giovanni Fonio v Nik Razborsek | 6-7,2-6 |
| ITF Italy F14 | 2018/06/13 17:45 | Nik Razborsek v Martins Podzus | 6-2,6-1 |
| ITF Italy F14 | 2018/06/11 15:15 | Filippo Leonardi v Nik Razborsek | 6-4,4-6,4-6 |
| ITF Bosnia and Herzegovina F3 | 2018/06/01 13:00 | Elmar Ejupovic v Nik Razborsek | 6-3,6-4 |
| ITF Bosnia and Herzegovina F3 | 2018/05/31 11:00 | Marko Vujic v Nik Razborsek | 1-6,0-6 |