| Tournament | Round | Arlene Williams | Chris Ostrowski |
| 27.01.2014 City of Sydney International Masters (NSW) | 13 | 370 | 399 |
| 27.01.2014 City of Sydney International Masters (NSW) | 21 | 378 | 456 |
| 26.01.2015 City of Sydney International Masters (NSW) | 20 | 357 | 363 |
| 29.01.2017 City of Sydney International Masters (NSW) | 10 | 342 | 493 |
| 04.11.2017 NOWRA (NSW) | 6 | 313 | 444 |
| 07.10.2019 NSW CHAMPIONSHIP (NSW) | 10 | 395 | 361 |
| 07.10.2019 NSW CHAMPIONSHIP (NSW) | 18 | 307 | 401 |
| 29.01.2023 CSIM2023 (NSW) | 3 | 351 | 382 |
| Head-to-head after 8 games | 1 | 7 | |
| Average score | 351.62 | 412.37 | |