Stadium: Opatija 2 Round: 60 Ground: Clay
| ITF Croatia F2 | 2018/03/14 12:55 | Antun Vidak v Matej Sabanov | 6-4,6-7,4-6 |
| ITF Croatia F2 | 2018/03/13 08:00 | Oleksii Krutykh v Antun Vidak | 6-7,6-4,2-6 |
| ITF Croatia F2 | 2018/03/12 13:00 | Antun Vidak v Ruslan Khunarikov | 6-1,6-3 |
| ITF Croatia F2 | 2018/03/12 08:00 | Buvaysar Gadamauri v Antun Vidak | 7-6,2-6,2-6 |
| ITF Croatia F1 | 2018/03/07 09:00 | Deni Zmak v Antun Vidak | 6-1,3-6,10-6 |
| ITF Croatia F1 | 2018/03/04 13:00 | Antun Vidak v Charly Zick | 4-6,6-3,6-2 |
| ITF Turkey F6 | 2018/02/10 09:00 | Antun Vidak v Koray Kirci | 3-6,3-6 |
| ITF Turkey F5 | 2018/02/05 07:30 | Vasil Kirkov v Antun Vidak | 7-5,6-2 |
| ITF Croatia F3 | 2018/03/19 12:30 | Karlo Cubelic v Philip Aplienz | 6-4,6-2 |
| ITF Croatia F3 | 2018/03/18 14:30 | Tino Kovacic v Karlo Cubelic | 4-6,5-7 |
| ITF Croatia F3 | 2018/03/18 08:00 | Karlo Cubelic v Bernie Schranz | 6-3,6-2 |
| ITF Croatia F2 | 2018/03/12 08:00 | Karlo Cubelic v Nikolas Walterscheid-Tukic | 4-6,3-6 |
| ITF Croatia F1 | 2018/03/07 09:00 | Vasile Antonescu v Karlo Cubelic | 6-4,6-2 |
| ITF Croatia F1 | 2018/03/04 14:30 | Karlo Cubelic v Grega Boh | 6-0,6-2 |
| ITF Croatia F1 | 2018/03/04 09:00 | Dennis Katzenwadel v Karlo Cubelic | 3-6,0-6 |
| ITF Switzerland F1 Qual | 2018/02/04 11:30 | Dominik Kellovsky v Karlo Cubelic | 6-1,7-6 |