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