| Tournament | Round | Joan Rosenthal | Derek Mckenzie |
| 04.04.1998 Hassall Grove (NSW) | 6 | 401 | 408 |
| 20.06.1998 Wollongong Marj Babb (NSW) | 6 | 454 | 302 |
| 12.07.1998 Chatswood (NSW) | 3 | 351 | 400 |
| 26.07.1998 Winter Masters (NSW) | 13 | 424 | 369 |
| 26.07.1998 Winter Masters (NSW) | 20 | 396 | 371 |
| 05.10.1998 New South Wales Championships (NSW) | 17 | 500 | 302 |
| 24.10.1998 Spring Marathon (NSW) | 3 | 389 | 279 |
| 24.10.1998 Spring Marathon (NSW) | 11 | 367 | 390 |
| 21.01.1999 City of Sydney Masters (NSW) | 14 | 392 | 438 |
| 21.01.1999 City of Sydney Masters (NSW) | 17 | 431 | 321 |
| 01.08.1999 Winter Masters (NSW) | 10 | 490 | 367 |
| 04.10.1999 New South Wales Championships (NSW) | 4 | 341 | 384 |
| 27.01.2002 City of Sydney International Masters (NSW) | 14 | 381 | 391 |
| 21.07.2002 Winter Masters (NSW) | 6 | 392 | 378 |
| Head-to-head after 14 games | 8 | 6 | |
| Average score | 407.78 | 364.28 | |
| Spread: | 609 | -609 | |