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