| Tournament | Round | Isabel Van Hoorn | Mary McMahon |
| 30.08.1998 Knox (VIC) | 4 | 392 | 301 |
| 21.03.1999 Prahran (VIC) | 1 | 311 | 390 |
| 05.12.1999 McKinnon (VIC) | 1 | 328 | 352 |
| 15.10.2000 Frankston (VIC) | 6 | 311 | 404 |
| 30.12.2000 Decathon (VIC) | 4 | 393 | 337 |
| 21.01.2001 Aestival (VIC) | 6 | 431 | 416 |
| 26.08.2001 Eastern Suburbs (VIC) | 5 | 367 | 388 |
| 04.04.2004 Langwarrin (VIC) | 3 | 401 | 323 |
| Head-to-head after 8 games | 4 | 4 | |
| Average score | 366.75 | 363.87 | |
| Spread: | 23 | -23 | |