| Tournament | Round | Ian Newton | Zina Costanzo |
| 17.10.1999 Frankston (VIC) | 3 | 333 | 437 |
| 23.06.2002 Nunawading (VIC) | 3 | 323 | 320 |
| 29.12.2002 Decathon (VIC) | 5 | 391 | 419 |
| 09.02.2003 Camberwell (VIC) | 4 | 292 | 503 |
| 12.04.2004 Australian Championships (ACT) | 10 | 240 | 385 |
| 02.07.2006 Bentleigh (VIC) | 5 | 313 | 413 |
| Head-to-head after 6 games | 1 | 5 | |
| Average score | 315.33 | 412.83 | |
| Spread: | -585 | 585 | |