Stadium: Centre Court Round: 14 Ground: Clay
| ITF M15 Metzingen | 2023/07/24 12:00 | Karlo Cubelic v Rostislav Galfinger | 2-6,4-6 |
| ITF M15 Metzingen | 2023/07/23 07:30 | Karlo Cubelic v Stefan Peter Hampe | 6-3,2-6,10-5 |
| ITF M15 Uslar | 2023/07/17 08:00 | Karlo Cubelic v Aaron James Williams | 6-7,6-4,6-10 |
| ITF M25 Kassel | 2023/07/12 11:55 | Hady Habib v Karlo Cubelic | 6-0,6-4 |
| ITF M25 Kassel | 2023/07/11 09:30 | Dominik Recek v Karlo Cubelic | 2-6,1-6 |
| ITF M25 Marburg | 2023/07/05 10:55 | Karlo Cubelic v Louis Wessels | 7-6,4-6,3-6 |
| ITF M25 Marburg | 2023/07/04 07:55 | Tomas Lanik v Karlo Cubelic | 3-6,6-1,7-10 |
| ITF M25 Marburg | 2023/07/03 08:00 | Noah Thurner v Karlo Cubelic | 7-6,3-6,8-10 |
| ATP Hamburg | 2023/07/22 13:20 | Marvin Moeller v Jan Choinski | 3-6,4-6 |
| ITF M25 Uriage | 2023/07/16 08:30 | Marvin Moeller v Ugo Blanchet | 3-6,4-6 |
| ITF M25 Uriage | 2023/07/14 09:20 | Marvin Moeller v Luca Wiedenmann | 7-6,7-6 |
| ITF M25 Uriage | 2023/07/13 15:00 | Valentin Royer v Marvin Moeller | 4-6,7-6,3-6 |
| ITF M25 Uriage | 2023/07/12 09:20 | Edouard Villoslada v Marvin Moeller | 2-6,1-6 |
| ITF M15 Sofia | 2023/07/09 06:50 | Goncalo Oliveira v Marvin Moeller | 6-3,6-1 |
| ITF M15 Sofia | 2023/07/08 07:30 | Marvin Moeller v Matej Dodig | 6-4,6-2 |
| ITF M15 Sofia | 2023/07/07 08:10 | Marvin Moeller v Jonathan Mridha | 6-4,6-2 |