| Tournament | Round | Trish Windhurst | Judy McGuinness |
| 05.10.1998 New South Wales Championships (NSW) | 7 | 352 | 295 |
| 05.10.1998 New South Wales Championships (NSW) | 12 | 354 | 298 |
| 05.10.1998 New South Wales Championships (NSW) | 13 | 360 | 282 |
| 17.01.1999 Baulkham Hills (NSW) | 3 | 340 | 402 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 351.5 | 319.25 | |
| Spread: | 129 | -129 | |