| Tournament | Round | Jeff Chelton | Zina Costanzo |
| 05.04.1999 Australian Championships (NSW) | 5 | 493 | 329 |
| 01.08.1999 Winter Masters (NSW) | 3 | 393 | 318 |
| 09.06.2001 Victorian Championships (VIC) | 21 | 327 | 335 |
| 12.04.2004 Australian Championships (ACT) | 13 | 334 | 372 |
| 11.06.2007 Victorian Championships (VIC) | 3 | 323 | 390 |
| Head-to-head after 5 games | 2 | 3 | |
| Average score | 374 | 348.8 | |
| Spread: | 126 | -126 | |