Stadium: Court 3 Round: 26 Ground: Clay
| ITF M25 Telfs | 2023/07/18 10:00 | Peter Heller v Niklas Schell | 6-3,6-1 |
| ITF M15 Antalya | 2023/04/21 07:30 | Viacheslav Bielinskyi v Peter Heller | 6-7,6-0,6-3 |
| ITF M15 Antalya | 2023/04/20 07:00 | Atakan Karahan v Peter Heller | 1-6,0-6 |
| ITF M15 Antalya | 2023/04/19 07:00 | Marsel Ilhan v Peter Heller | 5-7,1-6 |
| ITF M15 Antalya | 2023/04/05 09:55 | Michel Hopp v Peter Heller | 1-6,4-6 |
| ITF M15 Antalya | 2023/04/01 09:55 | Peter Heller v Cezar Cretu | 4-6,4-6 |
| ITF M15 Antalya | 2023/03/31 11:05 | Peter Heller v Mirko Martinez | 6-1,6-7,6-2 |
| ITF M15 Antalya | 2023/03/30 09:30 | Peter Heller v Nicolas Zanellato | 6-1,6-1 |
| ITF M25 Telfs | 2023/07/19 11:55 | Matthias Ujvary v Ondrej Horak | 2-6,4-6 |
| ITF M25 Telfs | 2023/07/17 10:00 | Ondrej Horak v Maurus Malgiaritta | 6-3,6-4 |
| ITF M25 Telfs | 2023/07/16 13:00 | Ondrej Horak v Elias Julian Werner | 6-4,7-5 |
| ITF M25 Poprad | 2023/06/19 08:00 | Ondrej Horak v Tomas Vaise | 4-6,4-6 |
| ITF M25 Poprad | 2023/06/18 08:00 | Ondrej Horak v Tomas Krcma | 6-2,6-2 |
| ITF M25 Jablonec Nad Nisou | 2023/05/31 13:50 | Evgeny Karlovskiy v Ondrej Horak | 7-6,6-2 |
| ITF M25 Jablonec Nad Nisou | 2023/05/30 07:55 | Thijmen Loof v Ondrej Horak | 6-7,3-6 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 09:00 | Vojtech Mares v Ondrej Horak | 5-7,0-6 |