| Tournament | Round | Gillian Renwick | Zina Costanzo |
| 27.07.2003 Bentleigh (VIC) | 3 | 332 | 408 |
| 13.06.2005 Victorian Championships (VIC) | 9 | 354 | 313 |
| 13.06.2005 Victorian Championships (VIC) | 12 | 296 | 341 |
| 16.10.2005 Frankston (VIC) | 4 | 289 | 319 |
| 06.11.2005 Geelong (VIC) | 1 | 272 | 455 |
| 28.12.2005 Decathon (VIC) | 2 | 345 | 291 |
| Head-to-head after 6 games | 2 | 4 | |
| Average score | 314.66 | 354.5 | |
| Spread: | -239 | 239 | |