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