Round: 29 Ground: Clay
| ITF - M25 - Posen - Herrendoppel | 2019/08/23 16:15 | Kowalczyk/Matuszewski v Kopriva/Velotti | 6-4,6-0 |
| ITF - M25 - Posen - Herrendoppel | 2019/08/22 09:00 | Drzewiecki/Zielinski v Kowalczyk/Matuszewski | 7-6,6-7,4-10 |
| ITF M15 Oslo MD | 2019/03/08 13:00 | Kowalczyk/Matuszewski v Paul/Steinegger | 4-6,1-6 |
| ITF M15 Oslo MD | 2019/03/07 13:00 | Mansson/Srbljak v Kowalczyk/Matuszewski | 3-6,3-6 |
| ITF M15 Oslo MD | 2019/03/05 14:50 | Kowalczyk/Matuszewski v Kalenichenko/Martinez | 7-6,7-5 |
| ITF - M15 - Kaarst - Herrendoppel | 2019/02/07 19:55 | Sijsling/Van De Zandschulp v Kowalczyk/Matuszewski | 6-3,6-2 |
| ITF - M15 - Bagnoles-de-l'Orne - Herrendoppel | 2019/01/10 16:30 | Kowalczyk/Matuszewski v Laurent/Lescure | 4-6,6-7 |
| ITF - M15 - Bagnoles-de-l'Orne - Herrendoppel | 2019/01/09 13:45 | Kowalczyk/Matuszewski v Brosset/Perchicot | 3-6,6-1,10-6 |
| ITF - M25 - Posen - Herrendoppel | 2019/08/23 13:45 | Olivieri/Carabelli v Hidalgo/Sakamoto | 3-6,6-3,6-10 |