| Tournament | Round | Olga Visser | Trevor Halsall |
| 15.04.1998 Australian Championships (TAS) | 5 | 370 | 424 |
| 01.10.2001 New South Wales Championships (NSW) | 10 | 335 | 380 |
| 25.01.2004 City of Sydney International Masters (NSW) | 3 | 302 | 467 |
| 12.04.2004 Australian Championships (ACT) | 17 | 370 | 391 |
| 26.01.2008 SYDNEY INTERNL MASTERS (NSW) | 6 | 371 | 443 |
| 04.05.2008 Queensland Championships (QLD) | 4 | 391 | 501 |
| 04.10.2008 NSW CHAMPIONSHIPS 08 (NSW) | 5 | 319 | 499 |
| Head-to-head after 7 games | 0 | 7 | |
| Average score | 351.14 | 443.57 | |
| Spread: | -647 | 647 | |