Stadium: Court 1 Round: 62 Ground: Clay
| ITF Serbia F4 | 2018/08/25 07:00 | Bilic, Feda v Suvajac, Stefan | 6-2,6-0 |
| ITF Serbia F3 | 2018/08/20 10:25 | Suvajac, Stefan v Subanovic, Nemanja | 4-6,2-6 |
| ITF Serbia F3 | 2018/08/19 12:30 | Mubarak, Abdulhamid v Suvajac, Stefan | 4-6,6-3,1-6 |
| ITF Serbia F3 | 2018/08/18 09:30 | Randjelovic, Ivan v Suvajac, Stefan | 7-5,4-6,1-6 |
| ITF Serbia F2 | 2018/08/12 08:00 | Alexandros Skorilas v Suvajac, Stefan | 6-1,6-3 |
| ITF Serbia F1 Qual | 2018/08/05 10:30 | Suvajac, Stefan v Boris Butulija | 3-6,5-7 |
| ITF Bosnia and Herzegovina F3 Qual | 2018/05/26 12:30 | Suvajac, Stefan v Nikolic, Milos | 5-7,6-4,4-6 |
| ITF Bosnia and Herzegovina F2 Qual | 2018/05/21 09:45 | Alexey Aleshchev v Suvajac, Stefan | 6-0,7-5 |
| ITF Bosnia and Herzegovina F1 Qual | 2018/05/13 08:00 | Andrea Picchione v Spencer, Paul | 4-6,6-2,6-3 |