| Tournament | Round | Tony Williams | Dianne Davis |
| 01.04.2013 Australian Championship (QLD) | 7 | 353 | 388 |
| 28.03.2016 Australian Championship (SA) | 9 | 362 | 416 |
| 18.09.2022 MASTERS and STATE CHALLENGE (VIC) | 5 | 253 | 385 |
| 19.04.2025 National Championship and Plate (SA) | 12 | 326 | 460 |
| Head-to-head after 4 games | 0 | 4 | |
| Average score | 323.5 | 412.25 | |
| Spread: | -355 | 355 | |