| Date | Tournament | State | Round | Bettina Tonkin | Janet Cotter |
|---|---|---|---|---|---|
| 30/05/1999 | Melville | WA | 5 | 357 | 387 |
| 27/03/2000 | Nedlands | WA | 1 | 462 | 295 |
| 08/07/2000 | Bassendean | WA | 2 | 296 | 391 |
| 08/09/2002 | Yokine | WA | 1 | 440 | 265 |
| 10/03/2002 | Bunbury | WA | 5 | 420 | 396 |
| 02/02/2003 | Fremantle | WA | 4 | 328 | 297 |
| 25/05/2003 | Melville | WA | 5 | 350 | 342 |
| 30/11/2003 | Hamersley | WA | 6 | 251 | 393 |
| 11/01/2004 | January Maximin | WA | 5 | 347 | 307 |
| 06/02/2005 | Fremantle | WA | 7 | 405 | 330 |
| Head-to-head after 10 games | 7 | 3 | |||
| Average score | 365.60 | 340.30 | |||
| Spread | 253 | -253 | |||