Stadium: Center Court Round: 46 Ground: Clay
| ITF Italy F21 Qual | 2018/07/28 14:45 | Zvonimir Oreskovic v Manuel Bernard | 3-6,6-2,7-6 |
| ITF Austria F1 | 2018/06/30 11:00 | Luca Staeheli v Zvonimir Oreskovic | 6-0,6-1 |
| ITF Bosnia and Herzegovina F3 Qual | 2018/05/28 12:55 | Manfred Fellin v Zvonimir Oreskovic | 6-2,3-6,5-7 |
| ITF Bosnia and Herzegovina F3 Qual | 2018/05/27 08:00 | Zvonimir Oreskovic v Milos Vukovic | 6-4,6-0 |
| ITF Bosnia and Herzegovina F3 Qual | 2018/05/26 07:00 | Zvonimir Oreskovic v Stefan Dragovic | 6-4,7-5 |
| ITF Bulgaria F1 | 2018/05/17 10:45 | Zvonimir Oreskovic v Calin Manda | 1-6,1-6 |
| ITF Bulgaria F1 | 2018/05/16 08:52 | Yan Sabanin v Zvonimir Oreskovic | 1-1 |
| ITF Hungary F1 Qual | 2018/05/05 10:00 | Filip Maric v Zvonimir Oreskovic | 7-6,2-6,6-4 |
| ITF Italy F21 Qual | 2018/07/28 17:40 | Jonas Greif v Horst Rieder | 1-6,4-6 |
| ITF Austria F4 Qual | 2018/07/22 08:00 | Yvo Panak v Horst Rieder | 6-2,6-0 |
| ITF Austria F4 Qual | 2018/07/21 10:00 | Carlos Kelaidis v Horst Rieder | 3-6,6-3,3-6 |
| ITF Italy F19 | 2018/07/14 08:30 | Andrea Grazioso v Horst Rieder | 6-4,6-1 |
| ITF Austria F2 | 2018/07/07 08:00 | Horst Rieder v Alexey Aleshchev | 2-6,0-6 |
| ITF Austria F2 | 2018/07/07 07:15 | Bjorn Nareyka v Horst Rieder | 2-6,4-6 |
| ITF Turkey F19 | 2018/05/15 08:20 | Horst Rieder v Francois-Arthur Vibert | 4-6,1-6 |
| ITF Turkey F19 Qual | 2018/05/14 07:30 | Joel Cannell v Horst Rieder | 4-6,7-6,6-4 |