Stadium: Court 2 Round: 28 Ground: Clay
| ITF Serbia F5 | 2018/09/07 08:00 | Denis Klok v Fabian Marozsan | 6-2,6-4 |
| ITF Serbia F5 | 2018/09/04 08:00 | Denis Klok v Nemanja Subanovic | 6-1,6-4 |
| ITF Russia F8 | 2018/08/28 10:45 | Denis Klok v Bogdan Bobrov | 1-6,3-6 |
| ITF Latvia F1 | 2018/08/04 08:00 | Ronald Slobodchikov v Denis Klok | 6-2,6-0 |
| ITF Latvia F1 | 2018/08/03 08:00 | Denis Klok v Fernando Yamacita | 6-2,7-5 |
| ITF Latvia F1 | 2018/08/02 09:30 | Matvey Minin v Denis Klok | 3-6,3-6 |
| ITF Latvia F1 | 2018/08/01 07:00 | Igor Gimenez v Denis Klok | 3-6,4-6 |
| ITF Latvia F1 | 2018/07/31 07:00 | Eduards Stefenbergs v Denis Klok | 0-6,0-6 |
| ITF Serbia F5 | 2018/09/07 09:15 | Dejan Katic v Pavle Daljev | 7-6,6-3 |
| ITF Serbia F5 | 2018/09/06 10:50 | Dejan Katic v Maximilian Gatev | 6-3,6-1 |
| ITF Serbia F5 | 2018/09/04 08:00 | Dejan Katic v Tomas Liska | 7-6,6-1 |
| ITF Serbia F4 | 2018/08/30 11:35 | Duje Ajdukovic v Dejan Katic | 6-3,7-6 |
| ITF Serbia F4 | 2018/08/29 11:55 | Nikola Puric v Dejan Katic | 1-6,1-6 |
| ITF Serbia F3 | 2018/08/23 08:00 | Ondrej Krstev v Dejan Katic | 6-7,6-3,3-6 |
| ITF Serbia F3 | 2018/08/21 08:00 | Lingxi Zhao v Dejan Katic | 1-6,3-6 |
| ITF Serbia F2 | 2018/08/16 11:25 | Dejan Katic v Simone Roncalli | 2-6,7-6,5-7 |