Stadium: Court 5 Round: 62 Ground: Clay
| ITF Serbia F4 | 2018/08/26 07:00 | Stefan Petrovic v Shendrit Deari | 6-3,6-3 |
| ITF Serbia F3 | 2018/08/18 09:30 | Stefan Petrovic v Sabit Suntic | 4-6,3-6 |
| ITF Serbia F2 | 2018/08/11 09:30 | Stefan Petrovic v Milan Krnjetin | 1-6,6-4,0-6 |
| ITF Serbia F1 Qual | 2018/08/05 08:00 | Stefan Petrovic v Stefan Skadarka | 5-7,4-6 |
| ITF Serbia F1 Qual | 2018/08/04 07:00 | Stefan Petrovic v Nitin Gunduboina | 7-5,6-3 |
| ITF Portugal F11 Qual | 2018/07/03 08:30 | Mark Whitehouse v Stefan Petrovic | 6-2,7-5 |
| ITF Portugal F11 Qual | 2018/07/02 11:00 | Alejandro S Nieto v Stefan Petrovic | 3-6,6-7 |
| ITF Portugal F11 Qual | 2018/07/01 16:00 | Harry Thursfield v Stefan Petrovic | 6-7,4-6 |
| ITF Serbia F4 | 2018/08/26 07:00 | Luka Markovic v Klim Ivanov | 6-3,6-4 |
| ITF Serbia F4 | 2018/08/25 10:00 | Marko Pavlovic v Luka Markovic | 2-6,0-6 |
| ITF Serbia F3 | 2018/08/19 08:00 | Luka Markovic v Petar Pjevcevic | 1-6,6-3,4-6 |
| ITF Serbia F3 | 2018/08/18 07:00 | Nino Portales v Luka Markovic | 4-6,3-6 |
| ITF Hungary F5 Qual | 2018/06/17 10:30 | Matvey Khomentovskiy v Luka Markovic | 6-0,6-0 |
| ITF Bosnia and Herzegovina F1 Qual | 2018/05/14 09:05 | Luka Markovic v Stefan Micov | 2-6,0-6 |
| ITF Bosnia and Herzegovina F1 Qual | 2018/05/12 11:30 | Pavle Daljev v Luka Markovic | 6-7,6-2,6-7 |