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