| Tournament | Round | Bettina Tonkin | Trish Marchand |
| 11.07.1999 Western Australian Masters (WA) | 7 | 293 | 436 |
| 08.07.2000 Bassendean (WA) | 4 | 498 | 284 |
| 10.09.2000 Yokine (WA) | 2 | 387 | 246 |
| 08.04.2001 Nedlands (WA) | 4 | 380 | 358 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 389.5 | 331 | |
| Spread: | 234 | -234 | |