| Result | Tournament |
|---|---|
| Fabian Grube defeated Jakub Koscielniak | 2018 Dynamic Billard Leende Open 9-Ball |
| Ivar Saris defeated Jakub Koscielniak | 2018 Dynamic Billard Leende Open 9-Ball |
| Jakub Koscielniak defeated Ruben Alves | 2018 Dynamic Billard Leende Open 9-Ball |
| Evgenii Buslaev defeated Jakub Koscielniak | 2017 EuroTour Billard Dutch Open 9-Ball |
| Jakub Koscielniak defeated Khalid Alotaibi | 2017 EuroTour Billard Dutch Open 9-Ball |
| Jakub Koscielniak defeated Yong-Xian Jiang | 2017 EuroTour Billard Dutch Open 9-Ball |
| Jakub Koscielniak defeated Nasser Mujaibel | 2017 EuroTour Billard Dutch Open 9-Ball |
| Stephan Cohen defeated Jakub Koscielniak | 2017 EuroTour Billard Dutch Open 9-Ball |
| Jakub Koscielniak defeated Djay Latuputty | 2017 EuroTour Billard Dutch Open 9-Ball |
| Manuel Gama defeated Jakub Koscielniak | 2014 EuroTour Treviso Open 9-Ball |
| Jakub Koscielniak defeated Bahram Lotfy | 2014 EuroTour Treviso Open 9-Ball |
| Ruslan Chinakhov defeated Jakub Koscielniak | 2014 EuroTour Treviso Open 9-Ball |
| Jakub Koscielniak defeated Sami Hamalainen | 2014 EuroTour Treviso Open 9-Ball |