Stadium: Court 2 Round: 45 Ground: Clay
| Challenger Portoroz Qual | 2018/08/05 08:00 | Albano Olivetti v Mate Delic | 6-4,7-6 |
| Challenger Liberec Qual | 2018/07/28 08:00 | Mate Delic v Marvin Moeller | 3-6,1-6 |
| Challenger Perugia Qual | 2018/07/09 08:00 | Ante Pavic v Mate Delic | 6-2,6-4 |
| Challenger Perugia Qual | 2018/07/08 09:40 | Juan Pablo Varillas v Mate Delic | 6-4,3-6,5-7 |
| ITF Bosnia and Herzegovina F1 | 2018/05/18 08:00 | Nerman Fatic v Mate Delic | 6-2,6-3 |
| ITF Bosnia and Herzegovina F1 | 2018/05/17 09:45 | Petr Hajek v Mate Delic | 6-7,5-7 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 09:00 | Valentin Vanta v Mate Delic | 0-6,1-6 |
| ITF Turkey F18 | 2018/05/12 07:30 | Mate Delic v Jules Okala | 4-6,4-6 |