| Date | Tournament | State | Round | Mary McMahon | Isabel Van Hoorn |
|---|---|---|---|---|---|
| 10/08/1997 | Jolly Roger | VIC | 5 | 379 | 345 |
| 07/12/1997 | McKinnon | VIC | 6 | 254 | 377 |
| 30/08/1998 | Knox | VIC | 4 | 301 | 392 |
| 21/03/1999 | Prahran | VIC | 1 | 390 | 311 |
| 05/12/1999 | McKinnon | VIC | 1 | 352 | 328 |
| 15/10/2000 | Frankston | VIC | 6 | 404 | 311 |
| 30/12/2000 | Decathon | VIC | 4 | 337 | 393 |
| 21/01/2001 | Aestival | VIC | 6 | 416 | 431 |
| 26/08/2001 | Eastern Suburbs | VIC | 5 | 388 | 367 |
| 04/04/2004 | Langwarrin | VIC | 3 | 323 | 401 |
| Head-to-head after 10 games | 5 | 5 | |||
| Average score | 354.40 | 365.60 | |||
| Spread | -112 | 112 | |||