Stadium: Court 5 Round: 44 Ground: Hardcourt indoor
| Majstrovstvá Nemecka | 2020/12/07 16:30 | Karlo Cubelic v Hendrik Jebens | 3-6,6-7 |
| ITF - M15 Sarreguemines | 2020/10/28 08:55 | Karlo Cubelic v Sandro Ehrat | 2-6,4-6 |
| ITF - M15 Sarreguemines | 2020/10/26 15:35 | Kai Lemstra v Karlo Cubelic | 4-6,7-5,8-10 |
| ITF - M15 Sarreguemines | 2020/10/25 16:20 | Karlo Cubelic v Adil Kalyanpur | 6-2,6-3 |
| ITF - M15 Forbach | 2020/09/30 08:30 | Karlo Cubelic v Daniele Capecchi | 1-6,6-1,5-7 |
| ITF - M15 Forbach | 2020/09/28 14:00 | Alafia Ayeni v Karlo Cubelic | 7-5,4-6,8-10 |
| ITF - M15 Forbach | 2020/09/28 07:00 | Pol Amoros Ramos v Karlo Cubelic | 1-6,5-7 |
| German Masters | 2020/08/28 13:15 | Daniil Glinka v Karlo Cubelic | 6-4,3-6,4-6 |
| ITF - M15 Monastir | 2020/12/13 09:00 | Fausto Tabacco v Tom Schonenberg | 7-6,7-5 |
| ITF - M15 Monastir | 2020/12/09 09:45 | Tom Schonenberg v Omni Kumar | 4-6,3-6 |
| ITF - M15 Monastir | 2020/12/07 13:30 | Tom Schonenberg v Adrian Oetzbach | 6-7,3-6 |
| ITF - M15 Monastir | 2020/12/07 09:00 | Ivan Liutarevich v Tom Schonenberg | 3-6,4-6 |
| ITF - M15 Monastir | 2020/12/06 10:00 | Tom Schonenberg v Harry Thursfield | 6-1,6-3 |
| ITF - M15 Monastir | 2020/11/30 08:00 | Tom Schonenberg v Adrian Oetzbach | 4-6,4-6 |
| ITF - M15 Monastir | 2020/11/29 10:00 | Ivan Liutarevich v Tom Schonenberg | 2-6,3-6 |
| ITF - M15 Monastir | 2020/11/23 15:30 | Giuliano Benedetti v Tom Schonenberg | 6-2,4-6,10-8 |