Stadium: Court 13 Round: 54 Ground: Carpet indoor
| ITF M15 Doha | 2021/10/20 17:15 | Tao Mu v Karlo Cubelic | 4-6,6-1,6-4 |
| ITF M15 Doha | 2021/10/11 13:30 | Karlo Cubelic v Nico Hornitschek | 7-5,4-6,6-10 |
| ITF M15 Doha | 2021/10/06 17:35 | Karlo Cubelic v Tao Mu | 2-6,3-6 |
| ITF M25 Eupen | 2021/09/07 15:25 | Karlo Cubelic v Maxime Chazal | 3-6,2-6 |
| ITF M15 Oldenzaal | 2021/08/17 07:30 | Mattia Bellucci v Karlo Cubelic | 7-6,7-5 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Adrian Oetzbach v Karlo Cubelic | 5-7,7-5,3-10 |
| ITF M15 Oldenzaal | 2021/08/15 12:00 | Jing L Weng v Karlo Cubelic | 3-6,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/10 08:20 | Daniel Cukierman v Karlo Cubelic | 2-6,6-4,10-2 |
| ITF M25 Hamburg | 2021/10/17 11:10 | Alen Moritz Hodzic v Tim Sandkaulen | 6-7,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 12:00 | Alen Moritz Hodzic v Ivan Marrero Curbelo | 6-3,4-6,6-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/15 07:00 | Tom Schonenberg v Alen Moritz Hodzic | 6-2,6-5 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 08:30 | Tom Gentzsch v Alen Moritz Hodzic | 4-6,6-2,5-4 |
| UTR Pro Tennis Series Mulheim | 2021/10/12 12:30 | Quin Verstegen v Alen Moritz Hodzic | 6-7,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/11 08:30 | Alen Moritz Hodzic v Christian Hansen | 6-7,7-6,3-5 |
| ITF M15 Forbach | 2021/09/26 10:00 | Alen Moritz Hodzic v Hazem Naw | 4-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 08:30 | Alen Moritz Hodzic v Jurriaan Bol | 2-6,2-6 |