| Tournament | Round | Joan Rosenthal | Ruby Kotwall |
| 15.08.1998 Revesby (NSW) | 2 | 396 | 368 |
| 05.04.1999 Australian Championships (NSW) | 1 | 330 | 413 |
| 08.05.1999 Hassall Grove (NSW) | 1 | 452 | 390 |
| 04.10.1999 New South Wales Championships (NSW) | 10 | 364 | 291 |
| 23.10.1999 Spring Marathon (NSW) | 3 | 526 | 339 |
| Head-to-head after 5 games | 4 | 1 | |
| Average score | 413.6 | 360.2 | |
| Spread: | 267 | -267 | |