| Date | Tournament | State | Round | Zina Costanzo | Eilene Howarth |
|---|---|---|---|---|---|
| 16/05/1998 | Dandenong | VIC | 1 | 422 | 290 |
| 23/05/1999 | Dandenong | VIC | 1 | 487 | 280 |
| 06/08/2000 | Knox | VIC | 1 | 345 | 269 |
| 05/08/2001 | Knox | VIC | 5 | 409 | 348 |
| Head-to-head after 4 games | 4 | 0 | |||
| Average score | 415.75 | 296.75 | |||
| Spread | 476 | -476 | |||