| Tournament | Round | Dianne Davis | Betty Foreman |
| 25.01.1998 City of Sydney International Masters (NSW) | 8 | 365 | 393 |
| 14.06.1999 Victorian Championships (VIC) | 6 | 374 | 355 |
| 30.01.2000 City of Sydney International Masters (NSW) | 6 | 363 | 305 |
| 16.04.2001 Australian Championships (VIC) | 20 | 335 | 432 |
| 27.01.2002 City of Sydney International Masters (NSW) | 4 | 385 | 378 |
| 06.04.2015 Australian Championship (VIC) | 5 | 383 | 365 |
| Head-to-head after 6 games | 4 | 2 | |
| Average score | 367.5 | 371.33 | |
| Spread: | -23 | 23 | |