| Tournament | Round | Harry Van Dijk | Marge Roberts |
| 30.09.2001 Manjimup (WA) | 6 | 379 | 406 |
| 25.09.2005 Manjimup Standard (WA) | 3 | 283 | 437 |
| 01.10.2006 Manjimup (WA) | 5 | 325 | 300 |
| 29.09.2007 Pinjarra Maximin (WA) | 4 | 302 | 337 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 322.25 | 370 | |
| Spread: | -191 | 191 | |