| Tournament | Round | Jan Serisier | Ethel Collins |
| 25.01.1998 City of Sydney International Masters (NSW) | 18 | 301 | 442 |
| 26.07.1998 Winter Masters (NSW) | 10 | 343 | 383 |
| 30.08.1998 Baulkham Hills (NSW) | 6 | 330 | 410 |
| 17.01.1999 Baulkham Hills (NSW) | 6 | 364 | 270 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 334.5 | 376.25 | |
| Spread: | -167 | 167 | |