| Tournament | Round | Jan Osborn | Margaret Wilton |
| 30.05.1999 Melville (WA) | 3 | 307 | 303 |
| 08.07.2000 Bassendean (WA) | 4 | 345 | 339 |
| 27.05.2001 Melville (WA) | 6 | 368 | 333 |
| 08.07.2001 Bassendean (WA) | 2 | 375 | 292 |
| Head-to-head after 4 games | 4 | 0 | |
| Average score | 348.75 | 316.75 | |
| Spread: | 128 | -128 | |