| Tournament | Round | Betty Ralph | Irene Metcalfe |
| 30.05.1999 Melville (WA) | 1 | 315 | 332 |
| 28.05.2000 Melville (WA) | 2 | 312 | 372 |
| 27.05.2001 Melville (WA) | 2 | 327 | 342 |
| 26.05.2002 Melville (WA) | 4 | 366 | 283 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 330 | 332.25 | |
| Spread: | -9 | 9 | |