| Tournament | Round | Siva Sivapalasundram | Ruby Kotwall |
| 15.03.1998 Sutherland (NSW) | 5 | 351 | 331 |
| 05.10.1998 New South Wales Championships (NSW) | 11 | 331 | 460 |
| 14.11.1998 Sydney (NSW) | 6 | 325 | 403 |
| 05.04.1999 Australian Championships (NSW) | 10 | 332 | 377 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 334.75 | 392.75 | |
| Spread: | -232 | 232 | |