| Tournament | Round | Derek McKenzie | Joan Watson |
| 11.10.1998 Greenbank (QLD) | 5 | 409 | 362 |
| 21.02.1999 Ipswich (QLD) | 4 | 444 | 281 |
| 21.08.1999 Queensland Championships (QLD) | 7 | 377 | 329 |
| 20.02.2000 Ipswich (QLD) | 6 | 390 | 462 |
| 20.08.2000 Queensland Championships (QLD) | 12 | 389 | 367 |
| 25.08.2002 Queensland Championships (QLD) | 7 | 360 | 414 |
| 25.08.2002 Queensland Championships (QLD) | 17 | 369 | 324 |
| 23.02.2008 Early Warm-Up (QLD) | 4 | 490 | 276 |
| 04.05.2008 Queensland Championships (QLD) | 5 | 394 | 378 |
| Head-to-head after 9 games | 7 | 2 | |
| Average score | 402.44 | 354.77 | |
| Spread: | 429 | -429 | |