| Tournament | Round | Elizabeth Ho | Zina Costanzo |
| 05.04.1999 Australian Championships (NSW) | 16 | 311 | 343 |
| 27.01.2001 City of Sydney International Masters (NSW) | 7 | 345 | 347 |
| 27.01.2002 City of Sydney International Masters (NSW) | 16 | 446 | 396 |
| Head-to-head after 3 games | 1 | 2 | |
| Average score | 367.33 | 362 | |
| Spread: | 16 | -16 | |