| Tournament | Round | Dawn Thomas | Zina Costanzo |
| 21.02.1999 Camberwell (VIC) | 5 | 376 | 363 |
| 18.07.1999 Nunawading (VIC) | 6 | 435 | 322 |
| 21.01.2001 Aestival (VIC) | 4 | 349 | 370 |
| 23.07.2001 Prahran (VIC) | 6 | 387 | 368 |
| 20.01.2002 Aestival (VIC) | 4 | 417 | 361 |
| 18.01.2004 Aestival (VIC) | 3 | 418 | 367 |
| 15.02.2004 Camberwell (VIC) | 6 | 441 | 305 |
| Head-to-head after 7 games | 6 | 1 | |
| Average score | 403.28 | 350.85 | |
| Spread: | 367 | -367 | |