| Mats Schjetne defeated Piotr Ostrowski |
2018 Dynamic Billard Veldhoven Open 9-Ball |
| Piotr Ostrowski defeated Aleksandr Jermikimov |
2018 Dynamic Billard Veldhoven Open 9-Ball |
| Ville Hamalainen defeated Piotr Ostrowski |
2018 Dynamic Billard Veldhoven Open 9-Ball |
| Oliver Ortmann defeated Piotr Ostrowski |
2018 Dynamic Billard Treviso Open 9-Ball |
| Piotr Ostrowski defeated Dylan Vyvey |
2018 Dynamic Billard Treviso Open 9-Ball |
| Miguel Silva defeated Piotr Ostrowski |
2018 Dynamic Billard Treviso Open 9-Ball |
| Karol Skowerski defeated Piotr Ostrowski |
2018 Dynamic Billard St. Johann im Pongau Open 9-Ball |
| Piotr Ostrowski defeated Daniel Schoepf |
2018 Dynamic Billard St. Johann im Pongau Open 9-Ball |
| Eklent KaCi defeated Piotr Ostrowski |
2018 Dynamic Billard St. Johann im Pongau Open 9-Ball |
| Piotr Ostrowski defeated Anastasios Kiriakidis |
2018 Dynamic Billard St. Johann im Pongau Open 9-Ball |
| Ramazan Akdag defeated Piotr Ostrowski |
2018 Dynamic Billard Leende Open 9-Ball |
| Piotr Ostrowski defeated Chris Fraser |
2018 Dynamic Billard Leende Open 9-Ball |
| Piotr Ostrowski defeated Meric Reshat |
2018 Dynamic Billard Leende Open 9-Ball |
| Alexander Kazakis defeated Piotr Ostrowski |
2018 Dynamic Billard Leende Open 9-Ball |
| Piotr Ostrowski defeated Ahmad Trablssia |
2018 Dynamic Billard Leende Open 9-Ball |
| Mark Gray defeated Piotr Ostrowski |
2019 Dynamic Billard Klagenfurt Open 9-Ball |
| Piotr Ostrowski defeated Vitaliy Patsura |
2019 Dynamic Billard Klagenfurt Open 9-Ball |
| Piotr Ostrowski defeated Ivar Saris |
2019 Dynamic Billard Klagenfurt Open 9-Ball |
| Piotr Ostrowski defeated David Arda |
2019 Dynamic Billard Klagenfurt Open 9-Ball |
| Sanjin Pehlivanovic defeated Piotr Ostrowski |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Piotr Ostrowski defeated Angelo Millauro |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Piotr Ostrowski defeated Oliver Szolnoki |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Piotr Ostrowski defeated Jere Virtaranta |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Francisco Sanchez-Ruiz defeated Piotr Ostrowski |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Piotr Ostrowski defeated Philipp Stojanovic |
2018 Dynamic Billard BHR Treviso Open 9-Ball |
| Luca Nicoletti defeated Piotr Ostrowski |
2011 EuroTour Treviso Open 9-Ball |
| Piotr Ostrowski defeated Nick Malai |
2011 EuroTour Treviso Open 9-Ball |
| Piotr Ostrowski defeated Thomas Stadler |
2011 EuroTour Treviso Open 9-Ball |
| Artem Koshovyi defeated Piotr Ostrowski |
2011 EuroTour Treviso Open 9-Ball |
| Piotr Ostrowski defeated Raffaele Canteduca |
2011 EuroTour Treviso Open 9-Ball |
| Mariusz Skoneczny defeated Piotr Ostrowski |
2011 EuroTour Hungary Open 10-Ball |
| Piotr Ostrowski defeated Caroline Roos |
2011 EuroTour Hungary Open 10-Ball |
| Piotr Ostrowski defeated Marko Vogel |
2011 EuroTour Hungary Open 10-Ball |
| Markus Juva defeated Piotr Ostrowski |
2011 EuroTour Hungary Open 10-Ball |
| Piotr Ostrowski defeated Thinh Nguyen |
2012 EuroTour German Open 10-Ball |
| Joshua Filler defeated Piotr Ostrowski |
2012 EuroTour German Open 10-Ball |
| Gabor Solymosi defeated Piotr Ostrowski |
2011 EuroTour German Open 10-Ball |
| Piotr Ostrowski defeated Mateusz Sniegocki |
2011 EuroTour German Open 10-Ball |
| Piotr Ostrowski defeated Erki Erm |
2011 EuroTour German Open 10-Ball |
| Carmine Nanula defeated Piotr Ostrowski |
2011 EuroTour German Open 10-Ball |
| Juan Carlos Exposito defeated Piotr Ostrowski |
2011 EuroTour French Open 9-Ball |
| Kristoffer Mindreboe defeated Piotr Ostrowski |
2011 EuroTour French Open 9-Ball |
| Piotr Ostrowski defeated Ivica Putnik |
2011 EuroTour French Open 9-Ball |
| Piotr Ostrowski defeated Jani Siekkinen |
2011 EuroTour French Open 9-Ball |
| Jakub Koniar defeated Piotr Ostrowski |
2017 EuroTour Billard Treviso Open 9-Ball |
| Piotr Ostrowski defeated Stanimir Ruslanov |
2017 EuroTour Billard Treviso Open 9-Ball |
| Piotr Ostrowski defeated Ralf Mrnka |
2017 EuroTour Billard Treviso Open 9-Ball |
| Wiktor Zielinski defeated Piotr Ostrowski |
2017 EuroTour Billard Treviso Open 9-Ball |
| Piotr Ostrowski defeated Levent Kurtulus |
2017 EuroTour Billard Treviso Open 9-Ball |
| Mihai Robert Braga defeated Piotr Ostrowski |
2016 EuroTour Billard Treviso Open 9-Ball |
| Kamil Szaszor defeated Piotr Ostrowski |
2016 EuroTour Billard Treviso Open 9-Ball |
| Ivo Aarts defeated Piotr Ostrowski |
2017 EuroTour Billard Portugal Open 9-Ball |
| Piotr Ostrowski defeated Dylan Vyvey |
2017 EuroTour Billard Portugal Open 9-Ball |
| Henrique Correia defeated Piotr Ostrowski |
2017 EuroTour Billard Portugal Open 9-Ball |
| Onur Yildrim defeated Piotr Ostrowski |
2017 EuroTour Billard Klagenfurt Open 9-Ball |
| Piotr Ostrowski defeated Daniel Maciol |
2017 EuroTour Billard Klagenfurt Open 9-Ball |
| Daniel Tangudd defeated Piotr Ostrowski |
2017 EuroTour Billard Klagenfurt Open 9-Ball |
| Bahram Lotfy defeated Piotr Ostrowski |
2017 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Mohammad Al-Khashawi |
2017 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Samir Kaddur |
2017 EuroTour Billard Italian Open 9-Ball |
| Sascha Trautmann defeated Piotr Ostrowski |
2017 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Imran Majid |
2017 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Sathaphon Sophaku |
2017 EuroTour Billard Italian Open 9-Ball |
| Piotr Kudlik defeated Piotr Ostrowski |
2015 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Alessandro Giordani |
2015 EuroTour Billard Italian Open 9-Ball |
| Piotr Ostrowski defeated Gabriele Crovetto |
2015 EuroTour Billard Italian Open 9-Ball |
| Wojciech Sroczynski defeated Piotr Ostrowski |
2015 EuroTour Billard Italian Open 9-Ball |
| Mateusz Sniegocki defeated Piotr Ostrowski |
2017 EuroTour Billard Dutch Open 9-Ball |
| Piotr Ostrowski defeated Jouni Nykanen |
2017 EuroTour Billard Dutch Open 9-Ball |
| Piotr Ostrowski defeated Cyriel Ledoux |
2017 EuroTour Billard Dutch Open 9-Ball |
| Piotr Ostrowski defeated André Minnier |
2017 EuroTour Billard Dutch Open 9-Ball |
| Piotr Ostrowski defeated Mohannad Alghumayz |
2017 EuroTour Billard Dutch Open 9-Ball |
| Manuel Pereira defeated Piotr Ostrowski |
2017 EuroTour Billard Dutch Open 9-Ball |
| Piotr Ostrowski defeated Hilbrand Boschma |
2017 EuroTour Billard Dutch Open 9-Ball |
| Uladzislau Tsyrykau defeated Piotr Ostrowski |
2016 EuroTour Billard Albanian Open 9-Ball |
| Piotr Ostrowski defeated Henrique Correia |
2016 EuroTour Billard Albanian Open 9-Ball |
| Theodore Thomas defeated Piotr Ostrowski |
2016 EuroTour Billard Albanian Open 9-Ball |
| Vittorio De Falco defeated Piotr Ostrowski |
2011 EuroTour Austria Open 9-Ball |
| Nicolas Ottermann defeated Piotr Ostrowski |
2011 EuroTour Austria Open 9-Ball |
| Steve Leisen defeated Piotr Ostrowski |
2010 EuroTour Austria Open 9-Ball |
| Piotr Ostrowski defeated Christian Johannessen |
2010 EuroTour Austria Open 9-Ball |
| Craig Osborne defeated Piotr Ostrowski |
2010 EuroTour Austria Open 9-Ball |
| Piotr Ostrowski defeated Gianluca Boni |
2010 EuroTour Austria Open 9-Ball |