| Tournament | Round | Betty Mitchell | Louisa Atsas |
| 11.03.2007 South Australian Championships (SA) | 12 | 331 | 293 |
| 07.03.2009 South Australian Championships (SA) | 4 | 365 | 304 |
| 06.11.2010 SA November (SA) | 2 | 365 | 433 |
| 28.12.2010 Xmas Leftovers (SA) | 3 | 409 | 355 |
| 06.02.2011 SA February (SA) | 4 | 451 | 268 |
| 16.04.2011 SA April (SA) | 4 | 281 | 351 |
| 22.05.2011 SA May (SA) | 5 | 342 | 306 |
| 17.09.2011 SA September (SA) | 4 | 393 | 295 |
| 27.12.2011 Christmas Leftovers (SA) | 4 | 342 | 510 |
| 11.03.2012 SA Championship (SA) | 8 | 399 | 322 |
| 07.07.2012 SA July (SA) | 3 | 400 | 311 |
| 21.02.2015 SA February (SA) | 6 | 396 | 291 |
| 16.05.2015 SA May (SA) | 6 | 356 | 473 |
| 20.06.2015 SA June (SA) | 5 | 340 | 370 |
| 11.07.2015 SA July (SA) | 4 | 319 | 454 |
| 19.09.2015 SA September (SA) | 2 | 356 | 370 |
| 10.10.2015 SA October (SA) | 6 | 374 | 352 |
| 18.06.2016 June SA Scrabble (SA) | 4 | 351 | 342 |
| 25.02.2017 4-4-4 Tournament (SA) | 4 | 287 | 430 |
| Head-to-head after 19 games | 11 | 8 | |
| Average score | 360.89 | 359.47 | |
| Spread: | 27 | -27 | |