| Tournament | Round | Trevor Tao | Carol Johnsen |
| 05.12.2009 Border Challenge (SA) | 8 | 453 | 404 |
| 23.10.2010 Vic/SA Border Challenge (VIC) | 7 | 434 | 385 |
| 16.10.2011 SA/Vic Border Challenge (SA) | 6 | 387 | 423 |
| 07.10.2012 Vic/SA Border Challenge (VIC) | 6 | 341 | 409 |
| 14.07.2013 SA/Vic Border Challenge (SA) | 8 | 356 | 343 |
| 19.10.2014 SA/Vic Border Challenge (VIC) | 1 | 613 | 298 |
| 16.10.2016 Vic/SA Border Challenge (VIC) | 6 | 466 | 293 |
| 21.10.2018 VicSA Border Challenge (VIC) | 8 | 512 | 400 |
| 08.03.2020 SA Championship (SA) | 5 | 452 | 261 |
| 06.03.2021 SA Champs (SA) | 14 | 468 | 468 |
| Head-to-head after 10 games | 7.5 | 2.5 | |
| Average score | 448.2 | 368.4 | |
| Spread: | 798 | -798 | |