Ground: Clay
| ITF M15 Eupen | 2023/08/08 08:00 | Axel Garcian v Jiri Cizek | 7-6,6-1 |
| ITF M15 Eupen | 2023/08/07 10:00 | Jiri Cizek v Marcel Hornung | 6-3,6-4 |
| ITF M15 Wroclaw | 2023/06/26 09:00 | Jiri Cizek v Tomas Jirousek | 5-7,4-6 |
| ITF M15 Wroclaw | 2023/06/25 08:00 | Jiri Cizek v Tomas Vaise | 3-6,6-4,10-6 |
| ITF M25 Poprad | 2023/06/19 08:00 | Filip Apltauer v Jiri Cizek | 6-3,5-7,10-8 |
| ITF M25 Jablonec Nad Nisou | 2023/05/29 09:00 | Jiri Cizek v Dominik Recek | 4-6,3-6 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 11:30 | Tomas Krcma v Jiri Cizek | 2-6,1-6 |
| ITF M25 Prague | 2023/05/17 11:00 | Jiri Cizek v Matthew William Donald | 6-7,3-6 |
| ITF M15 Naples | 2023/03/01 16:25 | ZhengQing Ji v Lukas H Lilleengen | 7-5,6-3 |
| ITF M15 Naples | 2023/02/28 14:30 | Arthur Bonnaud v Lukas H Lilleengen | 2-6,5-7 |
| ITF M15 Naples | 2023/02/20 15:00 | Oren Vasser v Lukas H Lilleengen | 6-3,0-6,10-2 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/25 10:00 | Lukas H Lilleengen v Constantin Bittoun Kouzmine | 2-6,6-3,3-6 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/23 14:10 | Lukas H Lilleengen v Maxence Rivet | 6-3,2-6,10-7 |
| ITF M15 Bagnoles-de-l'Orne | 2023/01/22 14:00 | Lukas H Lilleengen v Louis Larue | 6-2,6-1 |
| ITF M15 Vilnius | 2023/01/15 08:00 | Lukas H Lilleengen v Henrik Bladelius | 5-7,4-6 |
| ITF M25 Monastir | 2022/10/24 08:00 | Lukas H Lilleengen v Ye Cong Mo | 0-6,1-6 |