Stadium: Eden 4 Round: 60 Ground: Clay
| 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 |
| ITF Germany F3 | 2018/01/30 12:30 | Valentin Guenther v Karlo Cubelic | 6-7,6-4,6-4 |
| ITF Germany F1 | 2018/01/08 12:30 | Karlo Cubelic v Kai Lemstra | 6-4,2-6,4-6 |
| ITF Germany F1 | 2018/01/07 15:00 | Gabriel Schmidt v Karlo Cubelic | 5-7,3-6 |
| ITF Germany F1 | 2018/01/07 08:00 | Hendrik Jebens v Karlo Cubelic | 6-7,6-7 |
| ITF Germany F15 | 2017/10/15 12:00 | Jonas Trinker v Karlo Cubelic | 7-5,4-6,6-3 |
| ITF Germany F8 Qual | 2017/07/16 11:00 | Elmar Ejupovic v Karlo Cubelic | 6-0,6-4 |
| Challenger Portoroz | 2017/08/08 18:00 | Grega Zemlja v Grega Boh | 6-1,6-2 |
| ITF Portugal F13 | 2017/07/26 09:00 | Grega Boh v Mario Mansilla Diez | 7-6,2-6,4-6 |
| ITF Portugal F13 | 2017/07/24 08:30 | Grega Boh v Sergi Fontcuberta | 1-6,1-6 |
| ITF Portugal F12 | 2017/07/19 10:40 | Clement Larriere v Grega Boh | 6-1,6-2 |
| ITF Portugal F12 | 2017/07/18 08:00 | Antonio Cembellin Prieto v Grega Boh | 6-2,6-2 |
| ITF Portugal F12 | 2017/07/17 08:30 | Felipe Muzzi v Grega Boh | 6-7,5-7 |
| ITF Hungary F5 Qual | 2017/06/17 08:00 | Adam Hecimovic v Grega Boh | 6-2,6-1 |
| ITF Hungary F4 Qual | 2017/06/12 09:50 | Isa Mammetgulyyev v Grega Boh | 6-1,6-1 |