| Tournament | Round | Vicki Underhill | Olga Visser |
| 22.07.2007 Winter Masters (NSW) | 6 | 325 | 339 |
| 01.10.2007 New South Wales Champs (NSW) | 14 | 391 | 433 |
| 03.02.2008 Kempsey Challenge & Cup (NSW) | 8 | 369 | 396 |
| 01.02.2009 Kempsey (NSW) | 7 | 416 | 358 |
| 26.04.2009 Lismore ANZAC (NSW) | 2 | 267 | 429 |
| 29.08.2009 Qld Champs Sat (QLD) | 7 | 360 | 354 |
| Head-to-head after 6 games | 2 | 4 | |
| Average score | 354.66 | 384.83 | |