| Tournament | Round | Olga Visser | Chris Ostrowski |
| 04.10.2008 NSW CHAMPIONSHIPS 08 (NSW) | 1 | 484 | 360 |
| 05.10.2009 NSW CHAMPIONSHIPS (NSW) | 8 | 425 | 277 |
| 04.10.2010 NSW Championships (NSW) | 10 | 449 | 408 |
| 06.10.2014 NSW Championships (NSW) | 8 | 469 | 285 |
| 28.01.2024 CSIM 2024 (NSW) | 10 | 346 | 433 |
| 25.01.2026 CITY OF SYDNEY MASTERS (NSW) | 10 | 360 | 471 |
| Head-to-head after 6 games | 4 | 2 | |
| Average score | 422.16 | 372.33 | |
| Spread: | 299 | -299 | |