| ITF - Porec M15 | 03/07 12:25 | 26 | Timo Stodder v Denis Petak | 1-6,6-3,7-6 | |
| ITF - Porec M15 | 03/06 13:15 | 25 | Denis Petak v Filip Krolo | 6-0,6-4 | |
| ITF - Monastir M15 | 02/03 08:30 | 27 | Denis Petak v Evgeny Tyurnev | 2-6,3-6 | |
| ITF - Monastir M15 | 02/01 08:30 | 26 | Jacopo Berrettini v Denis Petak | 6-7,4-6 | |
| ITF - Monastir M15 | 01/31 13:40 | 25 | Nazim Makhlouf v Denis Petak | 4-6,6-4,3-6 | |
| Czechy - Extraliga | 12/17 09:10 | - | Denis Petak v Jelle Sels | 2-6,1-6 | |
| ITF - Opatija M15 | 03/22 08:25 | 25 | Denis Petak v Matteo Donati | 3-6,3-6 |