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