| Tournament | Round | Muriel Retford | Marge Roberts |
| 30.05.1999 Melville (WA) | 2 | 391 | 289 |
| 08.10.2000 Rockingham (WA) | 5 | 283 | 394 |
| 31.10.2005 Coogee (WA) | 7 | 377 | 351 |
| 21.05.2006 Melville (WA) | 1 | 353 | 311 |
| 24.08.2008 Rockingham (WA) | 1 | 294 | 283 |
| Head-to-head after 5 games | 4 | 1 | |
| Average score | 339.6 | 325.6 | |
| Spread: | 70 | -70 | |