Stadium: Court 9 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Irpin | 2019/05/27 10:00 | Vitaliy Sachko v Mateusz Terczynski | 6-2,6-2 |
| ITF M15 Troisdorf | 2019/05/06 11:00 | Dan Alexandru Tomescu v Mateusz Terczynski | 6-3,6-1 |
| ITF M15 Troisdorf | 2019/05/06 07:00 | Mateusz Terczynski v Luca Gelhardt | 2-6,6-2,13-11 |
| ITF M15 Madrid | 2019/04/15 11:00 | Mateusz Terczynski v Albert Roglan | 3-6,3-6 |
| ITF M15 Kaarst | 2019/02/04 18:20 | Martin Van Der Meerschen v Mateusz Terczynski | 7-6,2-6,12-10 |
| ITF M15 Kaarst | 2019/02/04 08:30 | Max Wiskandt v Mateusz Terczynski | 4-6,4-6 |
| ITF Turkey F41 | 2018/12/20 06:00 | Mateusz Terczynski v Luigi Sorrentino | 2-6,3-6 |
| ITF Turkey F40 | 2018/12/09 06:30 | Federico Lucini v Mateusz Terczynski | 6-2,6-2 |
| ITF Finland F4 | 2018/11/10 13:30 | Matvey Khomentovskiy v Hermanni Tiainen | 6-3,6-4 |
| ITF Estonia F3 | 2018/11/03 08:00 | Hermanni Tiainen v Philipp Klimov | 4-6,0-6 |
| ITF Estonia F2 | 2018/10/27 08:00 | Rihards Emulins v Hermanni Tiainen | 6-1,6-1 |
| ITF Finland F3 | 2018/08/11 12:00 | Peter Sillanpaa v Hermanni Tiainen | 6-3,6-3 |
| ITF Finland F2 Qual | 2018/08/04 10:00 | Aaron Prandstetter v Hermanni Tiainen | 7-6,6-4 |
| ITF Finland F1 Qual | 2018/07/28 07:00 | Hermanni Tiainen v Jason Sormunen | 3-6,0-6 |
| ITF Lithuania F1 | 2018/07/21 10:00 | Hermanni Tiainen v Matheus Pucinelli De Almeida | 3-6,0-6 |
| ITF Turkey F20 Qual | 2018/05/21 07:30 | Cengiz Aksu v Hermanni Tiainen | 6-1,6-1 |