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