| Tournament | Round | John Hamilton | Olga Visser |
| 05.10.2009 NSW CHAMPIONSHIPS (NSW) | 5 | 393 | 320 |
| 23.01.2010 CITY OF SYDNEY (NSW) | 15 | 383 | 409 |
| 26.09.2010 Moss Vale (NSW) | 1 | 258 | 509 |
| 21.04.2011 Championship WARMUP 2 (ACT) | 2 | 380 | 369 |
| 01.10.2012 NSW Championships (NSW) | 4 | 417 | 396 |
| 01.10.2012 NSW Championships (NSW) | 15 | 383 | 419 |
| 28.01.2013 CITY OF SYDNEY MASTERS (NSW) | 17 | 440 | 352 |
| Head-to-head after 7 games | 4 | 3 | |
| Average score | 379.14 | 396.28 | |
| Spread: | -120 | 120 | |