| Tournament | Round | Joan Riley | Ivy Nicholls |
| 08.02.1998 North West (TAS) | 2 | 319 | 365 |
| 20.04.2002 Beaumaris (TAS) | 7 | 369 | 284 |
| 25.01.2004 Ulverstone (TAS) | 8 | 366 | 430 |
| 23.01.2005 Ulverstone (TAS) | 14 | 329 | 357 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 345.75 | 359 | |
| Spread: | -53 | 53 | |