| Tournament | Round | Derek McKenzie | Jean McGiffen |
| 25.01.1998 City of Sydney International Masters (NSW) | 3 | 392 | 331 |
| 26.07.1998 Winter Masters (NSW) | 11 | 527 | 258 |
| 05.10.1998 New South Wales Championships (NSW) | 15 | 357 | 403 |
| 24.10.1998 Spring Marathon (NSW) | 5 | 437 | 394 |
| 05.04.1999 Australian Championships (NSW) | 13 | 403 | 308 |
| 01.08.1999 Winter Masters (NSW) | 4 | 346 | 427 |
| 01.08.1999 Winter Masters (NSW) | 20 | 424 | 329 |
| 04.10.1999 New South Wales Championships (NSW) | 7 | 368 | 406 |
| 22.04.2000 Australian Championships (QLD) | 11 | 471 | 341 |
| 16.04.2001 Australian Championships (VIC) | 4 | 335 | 429 |
| 27.01.2002 City of Sydney International Masters (NSW) | 6 | 506 | 256 |
| 21.07.2002 Winter Masters (NSW) | 9 | 329 | 522 |
| Head-to-head after 12 games | 7 | 5 | |
| Average score | 407.91 | 367 | |
| Spread: | 491 | -491 | |