| Tournament | Round | Zina Costanzo | Doug Ristic |
| 15.09.2001 Bunny (VIC) | 2 | 353 | 285 |
| 14.09.2002 Melbourne 15 Minutes (VIC) | 4 | 328 | 333 |
| 16.11.2002 Melbourne November (VIC) | 2 | 300 | 100 |
| 04.04.2004 Langwarrin (VIC) | 5 | 296 | 396 |
| 24.03.2006 March Notturno (VIC) | 3 | 430 | 459 |
| 11.06.2007 Victorian Championships (VIC) | 10 | 415 | 393 |
| Head-to-head after 6 games | 3 | 3 | |
| Average score | 353.66 | 327.66 | |
| Spread: | 156 | -156 | |