Stadium: Store 1 Round: 54 Ground: Clay
| ITF M15 - Celje | 2023/06/26 09:30 | Michal Novansky v Josip Simundza | 2-6,4-6 |
| ITF M15 - Store | 2023/06/20 08:00 | Filip Jeff Planinsek v Josip Simundza | 3-6,6-3,10-8 |
| ITF M15 - Store | 2023/06/19 12:50 | Edison Ambarzumjan v Josip Simundza | 4-6,3-6 |
| ITF M15 - Litija | 2023/06/15 11:50 | Sebastian Prechtel v Josip Simundza | 7-5,6-1 |
| ITF M15 - Litija | 2023/06/14 07:55 | Josip Simundza v Matic Kriznik | 7-6,6-1 |
| ITF M15 - Litija | 2023/06/13 07:00 | Josip Simundza v Matic Dimic | 6-3,6-2 |
| ITF M15 - Litija | 2023/06/12 07:00 | Zak Talic v Josip Simundza | 1-6,3-6 |
| ITF M15 - Sarajevo | 2023/06/06 11:50 | Nikola Basic v Josip Simundza | 2-6,6-3,10-4 |
| ITF M15 - Celje | 2023/06/26 10:55 | Maurus Malgiaritta v Niklas Waldner | 6-4,6-4 |
| ITF M15 - Store | 2023/06/20 07:55 | Maurus Malgiaritta v Dennis Dragomirov | 2-6,6-3,7-10 |
| ITF M15 - Litija | 2023/06/14 09:40 | Miha Vetrih v Maurus Malgiaritta | 6-2,7-6 |
| ITF M15 - Litija | 2023/06/13 07:00 | Tomas Jirousek v Maurus Malgiaritta | 6-4,6-2 |
| ITF M15 - Litija | 2023/06/12 11:00 | Sam Oster v Maurus Malgiaritta | 2-6,3-6 |
| ITF M25 - Jablonec Nad Nisou | 2023/05/28 08:00 | Mark Wallner v Maurus Malgiaritta | 6-1,6-0 |
| ITF M15 - Warmbad-Villach | 2023/05/21 08:00 | Philip Florig v Maurus Malgiaritta | 6-3,6-4 |
| ITF M15 - Antalya | 2023/04/30 07:00 | Jasza Szajrych v Maurus Malgiaritta | 6-3,4-6,10-8 |