| Tournament | Round | Trevor Halsall | Derek McKenzie |
| 25.01.1998 City of Sydney International Masters (NSW) | 8 | 408 | 380 |
| 21.01.1999 City of Sydney Masters (NSW) | 5 | 415 | 246 |
| 04.10.1999 New South Wales Championships (NSW) | 12 | 276 | 504 |
| 22.04.2000 Australian Championships (QLD) | 13 | 373 | 389 |
| 16.04.2001 Australian Championships (VIC) | 16 | 478 | 414 |
| 27.01.2002 City of Sydney International Masters (NSW) | 18 | 420 | 405 |
| 24.03.2008 Australian Championship (VIC) | 13 | 395 | 419 |
| 04.05.2008 Queensland Championships (QLD) | 15 | 373 | 433 |
| 08.04.2023 AUS CHAMPS (VIC) | 23 | 455 | 312 |
| Head-to-head after 9 games | 5 | 4 | |
| Average score | 399.22 | 389.11 | |
| Spread: | 91 | -91 | |