| Tournament | Round | Jan Serisier | Zina Costanzo |
| 05.10.1998 New South Wales Championships (NSW) | 5 | 364 | 349 |
| 21.01.1999 City of Sydney Masters (NSW) | 12 | 391 | 310 |
| 05.04.1999 Australian Championships (NSW) | 2 | 328 | 440 |
| 01.08.1999 Winter Masters (NSW) | 17 | 370 | 456 |
| 27.01.2001 City of Sydney International Masters (NSW) | 12 | 367 | 369 |
| 27.01.2002 City of Sydney International Masters (NSW) | 17 | 361 | 432 |
| 27.01.2002 City of Sydney International Masters (NSW) | 19 | 381 | 279 |
| 08.09.2002 Beecroft Marathon (NSW) | 2 | 376 | 342 |
| 07.10.2002 New South Wales Championships (NSW) | 7 | 360 | 376 |
| 27.01.2003 City of Sydney International Masters (NSW) | 15 | 318 | 421 |
| 21.04.2003 Australian Championships (SA) | 20 | 461 | 293 |
| 04.05.2003 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 10 | 376 | 329 |
| 02.05.2004 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 2 | 373 | 393 |
| Head-to-head after 13 games | 6 | 7 | |
| Average score | 371.23 | 368.38 | |
| Spread: | 37 | -37 | |