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