Stadium: Store 1 Round: 25 Ground: Clay
| ITF M15 Opatija | 2019/03/26 14:45 | Admir Kalender v Jonas Trinker | 6-3,6-4 |
| ITF M15 Celje | 2023/06/27 09:30 | Jonas Trinker v Aljaz Jeran | 6-7,4-6 |
| ITF M15 Celje | 2023/06/26 10:20 | Jonas Trinker v Michelangelo Z F Mreule | 6-2,6-1 |
| ITF M15 Cluj Napoca | 2023/06/21 08:30 | Radu Mihai Papoe v Jonas Trinker | 6-7,6-1,6-3 |
| ITF M15 Cluj Napoca | 2023/06/20 09:10 | Jonas Trinker v Bogdan Pavel | 6-3,6-3 |
| ITF M15 Litija | 2023/06/14 13:55 | Jonas Trinker v Peter Goldsteiner | 2-6,4-6 |
| ITF M15 Vaasa | 2023/06/07 11:00 | Jonas Trinker v Leonardo Rossi | 2-6,4-6 |
| ITF M15 Warmbad-Villach | 2023/05/22 11:25 | Jonas Trinker v Liam Gavrielides | 1-6,2-6 |
| ITF M15 Warmbad-Villach | 2023/05/21 12:00 | Jonas Trinker v Daniele Valentino | 6-3,4-6,10-5 |
| ITF M15 Litija | 2023/06/15 07:50 | Gal Emersic Potocnik v Admir Kalender | 6-3,2-6,4-6 |
| ITF M15 Litija | 2023/06/13 07:00 | Admir Kalender v Roko Horvat | 1-6,6-3,6-4 |
| ITF M15 Krsko | 2023/05/19 11:40 | Admir Kalender v Lucas Poullain | 2-6,4-6 |
| ITF M15 Krsko | 2023/05/18 14:55 | Lukas Palovic v Admir Kalender | 2-6,6-4,2-6 |
| ITF M15 Doboj | 2023/05/08 08:00 | Admir Kalender v Daniele Minighini | 4-6,6-3,2-10 |
| ITF M15 Kursumlijska Banja | 2023/04/26 07:00 | Admir Kalender v Petr Nesterov | 2-6,6-7 |
| ITF M15 Vilnius | 2023/01/16 09:20 | Admir Kalender v Jesse De Jager | 3-6,4-6 |
| ITF M15 Vilnius | 2023/01/15 08:00 | Admir Kalender v Daniil Piatrouski | 6-2,4-6,10-7 |