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