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