| Tournament | Round | Marge Roberts | Wynne Davidson |
| 13.02.2000 Fremantle (WA) | 4 | 344 | 426 |
| 10.06.2001 Advanced Intermediate Recreation (WA) | 5 | 346 | 331 |
| 03.10.2004 Manjimup (WA) | 6 | 320 | 370 |
| 06.06.2005 Western Australian Championships (WA) | 8 | 419 | 278 |
| 06.06.2005 Western Australian Championships (WA) | 16 | 355 | 335 |
| 04.06.2006 Western Australian Championships (WA) | 7 | 375 | 313 |
| 01.10.2006 Manjimup (WA) | 3 | 379 | 351 |
| 04.06.2007 Western Australian Championships C & D (WA) | 3 | 287 | 389 |
| 29.09.2007 Pinjarra Maximin (WA) | 3 | 383 | 284 |
| Head-to-head after 9 games | 6 | 3 | |
| Average score | 356.44 | 341.88 | |
| Spread: | 131 | -131 | |