| Tournament | Round | Harry Malcolm | Zina Costanzo |
| 09.08.1998 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 5 | 434 | 334 |
| 06.02.2000 Ballarat (VIC) | 5 | 442 | 334 |
| 22.07.2000 Melbourne Open (VIC) | 3 | 368 | 349 |
| 19.11.2000 Geelong (VIC) | 2 | 417 | 316 |
| 27.01.2001 City of Sydney International Masters (NSW) | 5 | 473 | 325 |
| 11.02.2001 Ballarat (VIC) | 1 | 350 | 400 |
| 28.10.2001 Teams Event (VIC) | 1 | 393 | 417 |
| 25.08.2002 Eastern Suburbs (VIC) | 3 | 273 | 407 |
| 29.09.2002 Essendon (VIC) | 1 | 424 | 385 |
| 11.09.2004 Raymond Island (VIC) | 6 | 464 | 376 |
| 26.09.2004 Essendon (VIC) | 5 | 261 | 391 |
| 10.10.2004 Frankston (VIC) | 1 | 398 | 369 |
| 14.11.2004 Geelong (VIC) | 1 | 313 | 408 |
| 11.12.2004 White Rabbit (VIC) | 1 | 420 | 331 |
| 11.12.2004 White Rabbit (VIC) | 5 | 348 | 375 |
| 29.12.2004 Decathon (VIC) | 1 | 381 | 291 |
| 13.06.2005 Victorian Championships (VIC) | 1 | 487 | 291 |
| 10.12.2006 McKinnon 2006 (VIC) | 5 | 488 | 323 |
| 11.06.2007 Victorian Championships (VIC) | 20 | 376 | 325 |
| 28.09.2008 Essendon (VIC) | 1 | 372 | 417 |
| 17.02.2019 Summer Fun (VIC) | 7 | 327 | 393 |
| Head-to-head after 21 games | 13 | 8 | |
| Average score | 390.9 | 359.85 | |
| Spread: | 652 | -652 | |