| Tournament | Round | Margaret Wilton | Ruth Probert |
| 14.02.1999 Fremantle (WA) | 1 | 289 | 331 |
| 10.06.2001 Advanced Intermediate Recreation (WA) | 3 | 372 | 266 |
| 12.08.2001 Yokine (WA) | 4 | 381 | 331 |
| 01.04.2007 Nedlands (WA) | 2 | 301 | 407 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 335.75 | 333.75 | |
| Spread: | 8 | -8 | |