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