| Tournament | Round | Bettina Tonkin | Annette Nienaber |
| 26.04.1998 Nedlands (WA) | 1 | 308 | 465 |
| 05.12.1999 Marathon December (WA) | 7 | 289 | 395 |
| 14.01.2001 WA Open (WA) | 6 | 370 | 355 |
| 27.05.2001 Melville (WA) | 5 | 368 | 336 |
| 08.07.2001 Bassendean (WA) | 2 | 406 | 447 |
| 13.01.2002 WA Open (WA) | 2 | 379 | 368 |
| Head-to-head after 6 games | 3 | 3 | |
| Average score | 353.33 | 394.33 | |
| Spread: | -246 | 246 | |