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