| ITF M25 Poznan | 2019/08/20 08:00 | Maciej Rajski v Kamil Gajewski | 6-1,6-3 |
| ITF M25 Poznan | 2019/08/19 08:00 | Kamil Gajewski v Noah Prehn | 6-1,6-7,10-6 |
| ITF M15 Koszalin | 2019/08/06 12:00 | Kamil Gajewski v Aliaksandr Liaonenka | 6-7,2-6 |
| ITF M15 Sharm El Sheikh | 2019/04/08 09:00 | Kamil Gajewski v Philip Bachmaier | 3-6,2-6 |
| ITF M15 Loule | 2019/03/05 14:30 | Juan Bautista Otegui v Kamil Gajewski | 6-2,7-5 |
| ITF Poland F6 | 2018/08/07 08:00 | Piotr Matuszewski v Kamil Gajewski | 6-3,4-6,6-4 |
| Challenger Sopot Qual | 2018/07/28 10:40 | Johannes Haerteis v Kamil Gajewski | 6-3,6-2 |
| ITF Poland F4 | 2018/05/21 07:00 | Kamil Gajewski v Nikolas Lahky | 6-3,6-7,1-6 |
| ITF M15 Sharm El Sheikh | 2020/02/17 09:00 | Moritz Trocker v Mateusz Terczynski | 6-4,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/16 11:00 | Mateusz Terczynski v Alexander Ovcharov | 6-2,3-6,10-3 |
| ITF M15 Sharm El Sheikh | 2020/02/09 12:00 | Mateusz Terczynski v Aleksei Khomich | 5-7,7-6,8-10 |
| ITF M15 Manacor | 2020/01/12 10:00 | Ugo Blanchet v Mateusz Terczynski | 6-4,6-3 |
| ITF M15 Manacor | 2020/01/06 10:30 | Mateusz Terczynski v Juan P Canas Garcia | 3-6,6-2,5-10 |
| ITF M15 Manacor | 2020/01/05 10:30 | Mateusz Terczynski v Tobias Brutscher | 6-2,6-1 |
| ITF M15 Bratislava | 2019/08/26 08:00 | Adrian Barbu v Mateusz Terczynski | 6-2,7-5 |
| ITF M15 Bratislava | 2019/08/25 11:30 | Vitalii Shcherba v Mateusz Terczynski | 0-6,3-6 |