| Tournament | Round | Isabel Van Hoorn | Dawn Thomas |
| 22.08.1999 Bentleigh (VIC) | 6 | 381 | 353 |
| 20.01.2002 Aestival (VIC) | 6 | 297 | 452 |
| 24.03.2002 Langwarrin (VIC) | 5 | 405 | 384 |
| 09.02.2003 Camberwell (VIC) | 6 | 412 | 420 |
| 30.03.2003 Langwarrin (VIC) | 3 | 400 | 500 |
| 14.06.2004 Victorian Championships (VIC) | 2 | 312 | 326 |
| 29.12.2004 Decathon (VIC) | 6 | 382 | 387 |
| 28.12.2005 Decathon (VIC) | 5 | 384 | 376 |
| Head-to-head after 8 games | 3 | 5 | |
| Average score | 371.62 | 399.75 | |
| Spread: | -225 | 225 | |