Stadium: Court 1 Round: 62 Ground: Clay
| ITF Bosnia and Herzegovina F1 Qual | 2018/05/13 10:30 | Zmak, Deni v Pjevcevic, Petar | 6-1,6-0 |
| ITF Croatia F3 | 2018/03/23 12:35 | Viola, Matteo v Zmak, Deni | 3-6,6-3,6-2 |
| ITF Croatia F3 | 2018/03/22 11:30 | Kai Lemstra v Zmak, Deni | 6-4,1-6,4-6 |
| ITF Croatia F3 | 2018/03/21 12:20 | Zmak, Deni v Perez Sanz, David | 6-3,6-0 |
| ITF Croatia F3 | 2018/03/20 08:30 | Sabanov, Ivan v Zmak, Deni | 2-6,3-6 |
| ITF Croatia F3 | 2018/03/19 14:00 | Zmak, Deni v Andres Gabriel Ciurletti | 6-2,6-2 |
| ITF Croatia F3 | 2018/03/19 11:00 | Andre Biro v Zmak, Deni | 2-6,3-6 |
| ITF Croatia F2 | 2018/03/13 08:00 | Kocevar-Desman, Tom v Zmak, Deni | 6-3,3-6,6-4 |