Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Sharm El Sheikh | 2021/02/07 07:00 | Luca Moro Almeida v Karlo Cubelic | 0-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/01/31 07:00 | Karlo Cubelic v Lukas Palovic | 6-3,3-6,1-10 |
| ITF M15 Bressuire | 2021/01/17 11:05 | Karlo Cubelic v Tom Schonenberg | 4-6,4-6 |
| German Championship | 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 Sharm El Sheikh | 2021/02/07 07:00 | Lukas Krainer v Giorgio Ricca | 6-4,6-0 |
| ITF M15 Sharm El Sheikh | 2021/02/03 11:20 | Facundo Diaz Acosta v Lukas Krainer | 6-3,6-0 |
| ITF M15 Cairo | 2021/01/24 09:30 | Luka Petrovic v Lukas Krainer | 2-6,7-6,10-3 |
| ITF M15 Cairo | 2021/01/19 08:00 | Andrey Chepelev v Lukas Krainer | 6-3,2-6,10-6 |
| ITF M15 Cairo | 2021/01/18 08:00 | Lukas Krainer v Sergi Perez Contri | 6-1,6-4 |
| ITF M15 Cairo | 2021/01/17 07:00 | Dhruv Sunish v Lukas Krainer | 3-6,3-6 |
| ITF M25 Prague | 2020/09/13 08:00 | Lukas Krainer v Tadeas Paroulek | 4-6,6-1,8-10 |
| ITF M15 Anif | 2020/08/23 12:00 | Alexander Shevchenko v Lukas Krainer | 6-2,6-7,11-9 |