| Tournament | Round | Bertha Williams | Noela Costello |
| 14.01.2001 WA Open (WA) | 5 | 320 | 301 |
| 08.04.2001 Nedlands (WA) | 2 | 288 | 324 |
| 27.05.2001 Melville (WA) | 1 | 273 | 362 |
| 10.06.2001 Advanced Intermediate Recreation (WA) | 5 | 367 | 319 |
| 21.04.2002 Nedlands (WA) | 6 | 316 | 344 |
| Head-to-head after 5 games | 2 | 3 | |
| Average score | 312.8 | 330 | |
| Spread: | -86 | 86 | |