Stadium: Court 7 Round: 44 Ground: Clay
| ITF M25 Kramsach | 2023/07/23 07:00 | Serafin Zund v Ondrej Horak | 6-2,1-6,10-8 |
| ITF M25 Telfs | 2023/07/20 09:45 | Peter Heller v Ondrej Horak | 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 M15 Wroclaw | 2023/06/25 09:00 | Marcel Politowicz v Tomas Jirousek | 2-6,2-6 |
| ITF M15 Monastir | 2023/06/19 08:30 | Madhwin Kamath v Marcel Politowicz | 6-2,6-1 |
| ITF M15 Monastir | 2023/06/18 08:30 | Marcel Politowicz v Kyle Rae | 6-4,6-3 |
| ITF M15 Monastir | 2023/06/12 08:30 | William Norton v Marcel Politowicz | 7-5,4-6,12-10 |
| ITF M15 Monastir | 2023/06/11 08:30 | Marcel Politowicz v Ryan A Dos Santos | 6-2,6-3 |
| ITF M15 Addis Ababa Qual | 2023/05/22 09:05 | Marcel Politowicz v Chirag Duhan | 7-6,3-6,5-10 |
| ITF M15 Addis Ababa Qual | 2023/05/21 10:20 | Yash Chaurasia v Marcel Politowicz | 1-6,5-7 |
| ITF M15 Addis Ababa | 2023/05/14 06:00 | Marcel Politowicz v Raffael Schaer | 1-6,2-6 |