| Tournament | Round | Ruby Kotwall | Jan Serisier |
| 26.07.1998 Winter Masters (NSW) | 7 | 399 | 414 |
| 05.10.1998 New South Wales Championships (NSW) | 10 | 344 | 345 |
| 05.04.1999 Australian Championships (NSW) | 8 | 391 | 337 |
| 14.08.1999 Revesby (NSW) | 6 | 333 | 386 |
| 11.04.2002 Sutherland (NSW) | 4 | 322 | 375 |
| Head-to-head after 5 games | 1 | 4 | |
| Average score | 357.8 | 371.4 | |
| Spread: | -68 | 68 | |