| Tournament | Round | Sal Costanzo | Isabel Van Hoorn |
| 15.11.1998 Geelong (VIC) | 1 | 428 | 309 |
| 30.12.2000 Decathon (VIC) | 2 | 429 | 328 |
| 24.06.2001 Nunawading (VIC) | 2 | 463 | 375 |
| 29.12.2001 Decathon (VIC) | 5 | 420 | 361 |
| 08.06.2003 Victorian Championships (VIC) | 3 | 342 | 300 |
| 06.11.2005 Geelong (VIC) | 5 | 451 | 292 |
| Head-to-head after 6 games | 6 | 0 | |
| Average score | 422.16 | 327.5 | |
| Spread: | 568 | -568 | |