| Result | Tournament |
|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Mihai Robert Braga defeated Piotr Ostrowski | 2016 EuroTour Billard Treviso Open 9-Ball |