| Date | Tournament | State | Round | Isabel Van Hoorn | Zina Costanzo |
|---|---|---|---|---|---|
| 13/09/1997 | Melbourne Cup White Rabbit Tournament (P) | VIC | 4 | 302 | 319 |
| 28/09/1997 | Essendon | VIC | 5 | 377 | 292 |
| 07/12/1997 | McKinnon | VIC | 4 | 349 | 444 |
| 30/08/1998 | Knox | VIC | 5 | 400 | 346 |
| 27/08/2000 | Bentleigh | VIC | 6 | 337 | 384 |
| 20/01/2002 | Aestival | VIC | 1 | 337 | 382 |
| 24/03/2002 | Langwarrin | VIC | 6 | 378 | 396 |
| 27/04/2002 | Western Suburbs | VIC | 3 | 335 | 484 |
| 23/06/2002 | Nunawading | VIC | 5 | 382 | 362 |
| 15/05/2005 | Dandenong | VIC | 4 | 427 | 394 |
| 11/09/2005 | World Scrabble Championships Fundraiser | VIC | 8 | 413 | 285 |
| 28/12/2005 | Decathon | VIC | 10 | 439 | 346 |
| 28/05/2006 | 06DAND.TOU | VIC | 2 | 341 | 321 |
| 12/06/2006 | vic06 ONE DAY | VIC | 5 | 342 | 398 |
| Head-to-head after 14 games | 7 | 7 | |||
| Average score | 368.50 | 368.07 | |||
| Spread | 6 | -6 | |||