| Tournament | Round | Betty Irwin | Alan Gauci |
| 20.06.1998 Wollongong Marj Babb (NSW) | 6 | 336 | 360 |
| 13.02.1999 Wollongong (NSW) | 1 | 389 | 308 |
| 05.06.1999 Wollongong Marj Babb (NSW) | 2 | 356 | 352 |
| 17.06.2000 Wollongong Marj Babb (NSW) | 3 | 383 | 330 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 366 | 337.5 | |
| Spread: | 114 | -114 | |