| Tournament | Round | Ruth Probert | Marge Roberts |
| 14.02.1999 Fremantle (WA) | 3 | 285 | 331 |
| 15.05.2005 Melville (WA) | 1 | 373 | 387 |
| 31.10.2005 Coogee (WA) | 3 | 320 | 301 |
| 21.05.2006 Melville (WA) | 6 | 401 | 324 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 344.75 | 335.75 | |
| Spread: | 36 | -36 | |