| Tournament | Round | Grace de Bonis | Harry Van Dijk |
| 18.10.1998 Rockingham (WA) | 6 | 285 | 267 |
| 13.03.2005 Bunbury (WA) | 4 | 336 | 298 |
| 12.03.2006 Bunbury (WA) | 3 | 308 | 310 |
| 01.10.2006 Manjimup (WA) | 1 | 373 | 282 |
| 29.09.2007 Pinjarra Maximin (WA) | 2 | 290 | 353 |
| Head-to-head after 5 games | 3 | 2 | |
| Average score | 318.39 | 302 | |
| Spread: | 82 | -82 | |