| Tournament | Round | Judy Hay | Zina Costanzo |
| 09.08.1998 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 1 | 351 | 400 |
| 09.08.1998 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 12 | 353 | 391 |
| 05.10.1998 New South Wales Championships (NSW) | 8 | 368 | 293 |
| 22.04.2000 Australian Championships (QLD) | 16 | 336 | 362 |
| 27.01.2001 City of Sydney International Masters (NSW) | 13 | 326 | 303 |
| Head-to-head after 5 games | 2 | 3 | |
| Average score | 346.8 | 349.8 | |
| Spread: | -15 | 15 | |