| Tournament | Round | Bettina Tonkin | Wynne Davidson |
| 29.09.2002 Manjimup (WA) | 5 | 370 | 364 |
| 10.03.2002 Bunbury (WA) | 2 | 286 | 362 |
| 10.11.2002 Coogee (WA) | 1 | 367 | 411 |
| 02.02.2003 Fremantle (WA) | 2 | 331 | 443 |
| 23.02.2003 Kwinana (WA) | 4 | 363 | 344 |
| 31.05.2003 Western Australian Championships (WA) | 9 | 452 | 278 |
| 28.09.2003 Manjimup (WA) | 4 | 299 | 340 |
| 11.01.2004 January Maximin (WA) | 4 | 360 | 300 |
| 09.03.2008 Bunbury (WA) | 1 | 375 | 289 |
| 06.04.2008 MAXIMIN APRIL (WA) | 3 | 434 | 315 |
| 05.10.2008 SPRING MAXIMIN 2008 (WA) | 3 | 395 | 309 |
| Head-to-head after 11 games | 7 | 4 | |
| Average score | 366.54 | 341.36 | |
| Spread: | 277 | -277 | |