| Tournament | Round | Ruby Kotwall | Robin Duncan |
| 20.06.1998 Wollongong Marj Babb (NSW) | 2 | 345 | 404 |
| 14.11.1998 Sydney (NSW) | 2 | 431 | 372 |
| 08.05.1999 Hassall Grove (NSW) | 9 | 349 | 360 |
| 05.06.1999 Wollongong Marj Babb (NSW) | 1 | 310 | 456 |
| 10.07.1999 Chatswood (NSW) | 2 | 318 | 413 |
| Head-to-head after 5 games | 1 | 4 | |
| Average score | 350.6 | 401 | |
| Spread: | -252 | 252 | |