| Date | Tournament | State | Round | Zina Costanzo | Patricia Mitchell |
|---|---|---|---|---|---|
| 31/03/1997 | Australian Scrabble Championship | SA | 7 | 294 | 422 |
| 08/06/1998 | Victorian Championships | VIC | 7 | 377 | 367 |
| 21/01/2001 | Aestival | VIC | 7 | 366 | 436 |
| 05/08/2001 | Knox | VIC | 4 | 413 | 384 |
| 20/01/2002 | Aestival | VIC | 2 | 317 | 416 |
| 27/04/2002 | Western Suburbs | VIC | 2 | 455 | 323 |
| 10/06/2002 | Victorian Championships | VIC | 20 | 456 | 390 |
| 19/10/2003 | Frankston | VIC | 6 | 390 | 284 |
| 04/07/2004 | Nunawading | VIC | 4 | 421 | 370 |
| 12/06/2006 | vic06 ONE DAY | VIC | 6 | 400 | 381 |
| 01/10/2006 | Essendon | VIC | 1 | 421 | 245 |
| Head-to-head after 11 games | 8 | 3 | |||
| Average score | 391.82 | 365.27 | |||
| Spread | 292 | -292 | |||