| Tournament | Round | Isabel Van Hoorn | Phyllis Whitelaw |
| 08.02.1998 Camberwell (VIC) | 5 | 353 | 414 |
| 06.12.1998 Brighton (VIC) | 6 | 375 | 438 |
| 21.03.1999 Prahran (VIC) | 2 | 288 | 416 |
| 23.05.1999 Dandenong (VIC) | 5 | 329 | 446 |
| 18.07.1999 Nunawading (VIC) | 1 | 369 | 321 |
| 05.12.1999 McKinnon (VIC) | 5 | 401 | 350 |
| 23.01.2000 Aestival (VIC) | 6 | 447 | 332 |
| Head-to-head after 7 games | 3 | 4 | |
| Average score | 366 | 388.14 | |
| Spread: | -155 | 155 | |