Stadium: Sportna Dvorana Golovec Round: 54 Ground: Clay
| ITF M15 Litija | 2023/06/12 07:00 | Corey Gaal v Mark Wallner | 3-6,6-3,12-10 |
| ITF M25 Jablonec Nad Nisou | 2023/05/29 08:00 | Luca Wiedenmann v Mark Wallner | 6-4,6-3 |
| 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 10:00 | Jakob Schnaitter v Mark Wallner | 6-3,6-0 |
| ITF M25 Prague | 2023/05/18 09:00 | Mark Wallner v Patrik Rikl | 2-6,2-6 |
| ITF M25 Prague | 2023/05/16 08:00 | Mark Wallner v Lukas Velik | 6-2,6-3 |
| ITF M25 Prague | 2023/05/15 11:00 | Mark Wallner v Eduard Silviu Schipor | 6-0,6-0 |
| ITF M25 Prague | 2023/05/14 11:00 | Daniel Paty v Mark Wallner | 6-2,1-6,8-10 |
| ITF M15 Store | 2023/06/24 09:15 | Alexander Klintcharov v Dominik Kellovsky | 2-6,6-7 |
| ITF M15 Store | 2023/06/23 07:00 | Alexander Klintcharov v Andrea Guerrieri | 7-5,7-6 |
| ITF M15 Store | 2023/06/22 07:25 | Lorenzo Bocchi v Alexander Klintcharov | 2-6,2-6 |
| ITF M15 Store | 2023/06/21 12:15 | Alexander Klintcharov v Matic Kriznik | 2-6,6-2,6-3 |
| ITF M15 Store | 2023/06/20 12:10 | Miha Vetrih v Alexander Klintcharov | 2-6,1-6 |
| ITF M15 Store | 2023/06/19 09:30 | Vid Mohar v Alexander Klintcharov | 0-6,1-6 |
| ITF M25 Grasse | 2023/06/11 17:35 | Alexander Klintcharov v Matthieu Bolot | 4-6,1-6 |
| ITF M25 Carnac | 2023/05/30 09:50 | Maxence Beauge v Alexander Klintcharov | 7-5,3-6,6-3 |