| Tournament | Round | Alan Mathews | Bettina Tonkin |
| 17.01.1999 WA Open (WA) | 5 | 317 | 403 |
| 02.09.2001 Western Australian Masters (WA) | 3 | 306 | 386 |
| 13.01.2002 WA Open (WA) | 6 | 421 | 378 |
| 10.08.2002 Western Australian Masters (WA) | 3 | 323 | 391 |
| 05.06.2017 WA Championship (WA) | 6 | 361 | 368 |
| 05.06.2017 WA Championship (WA) | 17 | 372 | 312 |
| 14.01.2018 Jan HALFAM (WA) | 3 | 519 | 337 |
| 14.01.2018 Jan HALFPM (WA) | 4 | 396 | 380 |
| 23.06.2019 Bassendean (WA) | 1 | 342 | 393 |
| 16.05.2021 MELV2021 (WA) | 2 | 463 | 260 |
| 05.06.2022 WA State 2022 (WA) | 12 | 475 | 300 |
| 13.11.2022 BISECTION NOV 2022 (WA) | 3 | 355 | 367 |
| 19.02.2023 February Bisection (WA) | 5 | 421 | 435 |
| 04.06.2023 WA State Champs 2023 (WA) | 15 | 489 | 363 |
| 09.07.2023 AGM BISECTION (WA) | 5 | 461 | 298 |
| 02.06.2024 WA State Championship (WA) | 15 | 451 | 281 |
| 01.06.2025 WA Championship 2025 (WA) | 2 | 329 | 343 |
| 01.06.2025 WA Championship 2025 (WA) | 13 | 510 | 317 |
| 05.10.2025 October Bisection (WA) | 7 | 408 | 300 |
| Head-to-head after 19 games | 11 | 8 | |
| Average score | 406.26 | 348 | |
| Spread: | 1107 | -1107 | |