| Tournament | Round | Trish Marchand | Janet Cotter |
| 25.04.1999 Nedlands (WA) | 2 | 399 | 351 |
| 27.03.2000 Nedlands (WA) | 4 | 306 | 430 |
| 11.03.2001 Bunbury (WA) | 5 | 413 | 340 |
| 21.04.2002 Nedlands (WA) | 1 | 315 | 301 |
| 14.07.2002 Bassendean (WA) | 4 | 274 | 316 |
| 10.03.2002 Bunbury (WA) | 3 | 394 | 389 |
| Head-to-head after 6 games | 4 | 2 | |
| Average score | 350.16 | 354.5 | |
| Spread: | -26 | 26 | |