| Tournament | Round | Isabel Van Hoorn | Ian Newton |
| 26.04.1998 Western Suburbs (VIC) | 5 | 335 | 387 |
| 31.10.1999 Geelong (VIC) | 1 | 345 | 374 |
| 24.06.2001 Nunawading (VIC) | 5 | 489 | 361 |
| 19.01.2003 Bil Rose Aestival (VIC) | 1 | 342 | 475 |
| 15.02.2004 Camberwell (VIC) | 6 | 431 | 361 |
| Head-to-head after 5 games | 2 | 3 | |
| Average score | 388.4 | 391.6 | |
| Spread: | -16 | 16 | |