Stadium: Court 4 Round: 54 Ground: Clay
| Challenger Portoroz Qual | 2018/08/04 15:00 | David L Ambrozic v Tomas Lipovsek Puches | 0-6,0-6 |
| ITF Austria F5 Qual | 2018/07/30 12:00 | Vital Flurin Leuch v David L Ambrozic | 6-1,6-0 |
| ITF Austria F5 Qual | 2018/07/29 10:30 | Filippo Giovannini v David L Ambrozic | 2-6,6-4,4-6 |
| ITF Austria F5 Qual | 2018/07/28 10:00 | Luka Matic v David L Ambrozic | 6-2,6-7,0-6 |
| ITF Belgium F4 | 2018/07/14 12:00 | Simon Beaupain v David L Ambrozic | 6-1,6-4 |
| ITF Belgium F4 | 2018/07/14 08:30 | Stefan Borms v David L Ambrozic | 6-7,0-6 |
| ITF Greece F10 | 2017/11/19 08:00 | Stephanos Schinas v David L Ambrozic | 6-1,7-6 |
| ITF Greece F9 Qual | 2017/11/11 08:30 | Cristiano Russo v David L Ambrozic | 6-2,6-0 |
| ITF Serbia F4 | 2018/08/30 10:35 | Marko Miladinovic v Aleksa Ciric | 6-4,6-3 |
| ITF Serbia F4 | 2018/08/29 08:30 | Aleksa Ciric v Darko Jandric | 6-4,6-3 |
| ITF Serbia F4 | 2018/08/27 10:10 | Aleksa Ciric v Stamatios Kapiris | 6-2,6-3 |
| ITF Serbia F4 | 2018/08/26 07:00 | Shinnosuke Hiramatsu v Aleksa Ciric | 7-5,1-6,5-7 |
| ITF Serbia F3 | 2018/08/21 11:00 | Marko Miladinovic v Aleksa Ciric | 6-2,6-1 |
| ITF Serbia F1 Qual | 2018/08/05 10:30 | Dusan Rajic v Aleksa Ciric | 6-7,6-3,6-3 |
| ITF Serbia F1 Qual | 2018/08/04 09:30 | Aleksa Ciric v Melik Feler | 4-6,6-2,6-2 |