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