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