| Tournament | Round | Olga Visser | Derek Mckenzie |
| 23.08.1998 Queensland Championships (QLD) | 1 | 251 | 444 |
| 11.10.1998 Greenbank (QLD) | 2 | 437 | 424 |
| 21.03.1999 Redcliffe (QLD) | 2 | 302 | 491 |
| 02.05.1999 Maelstrom (QLD) | 6 | 420 | 363 |
| 23.05.1999 Brisbane Open (QLD) | 3 | 352 | 419 |
| 21.08.1999 Queensland Championships (QLD) | 14 | 287 | 445 |
| 02.04.2000 Brisbane Open (QLD) | 4 | 298 | 454 |
| 14.07.2001 Chatswood (NSW) | 7 | 522 | 445 |
| 21.07.2002 Winter Masters (NSW) | 17 | 432 | 403 |
| Head-to-head after 9 games | 4 | 5 | |
| Average score | 366.77 | 432 | |
| Spread: | -587 | 587 | |