| Tournament | Round | Trevor Halsall | Doris Schwenn |
| 15.04.1998 Australian Championships (TAS) | 10 | 357 | 409 |
| 13.02.2000 South Australian Championships (SA) | 11 | 342 | 352 |
| 08.03.2003 South Australian Championships (SA) | 3 | 407 | 348 |
| 12.04.2004 Australian Championships (ACT) | 1 | 448 | 299 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 388.5 | 352 | |
| Spread: | 146 | -146 | |