| Tournament | Round | John Spaan | Dianne Davis |
| 28.12.1999 Decathon (VIC) | 15 | 434 | 419 |
| 16.04.2001 Australian Championships (VIC) | 13 | 380 | 407 |
| 06.05.2001 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 1 | 300 | 350 |
| 09.04.2007 Australian Championships (NSW) | 8 | 340 | 402 |
| 02.04.2018 2018 National Championship (ACT) | 6 | 383 | 365 |
| 04.04.2026 AUS CHAMPS (ACT) | 13 | 453 | 359 |
| Head-to-head after 6 games | 3 | 3 | |
| Average score | 381.66 | 383.66 | |
| Spread: | -12 | 12 | |