| Tournament | Round | Ethel Collins | Ruby Kotwall |
| 26.07.1998 Winter Masters (NSW) | 12 | 363 | 403 |
| 26.07.1998 Winter Masters (NSW) | 19 | 397 | 346 |
| 05.04.1999 Australian Championships (NSW) | 17 | 350 | 354 |
| Head-to-head after 3 games | 1 | 2 | |
| Average score | 370 | 367.66 | |
| Spread: | 7 | -7 | |