| Tournament | Round | Harry Malcolm | Olga Visser |
| 15.04.1998 Australian Championships (TAS) | 6 | 396 | 320 |
| 19.01.2002 Baulkham Hills Kick-off (NSW) | 2 | 340 | 341 |
| 18.07.2004 Winter Masters (NSW) | 17 | 453 | 345 |
| 18.09.2005 Australian Masters & State Challenge Trophy (VIC) | 18 | 411 | 383 |
| 19.09.2005 Notturno (VIC) | 4 | 418 | 358 |
| 17.04.2006 Australian Championships (QLD) | 20 | 364 | 328 |
| 12.08.2006 Magnetic Island - Sat (QLD) | 4 | 460 | 377 |
| 13.08.2006 Magnetic Island Sun (QLD) | 4 | 355 | 330 |
| 04.08.2007 Magnetic Island Saturday (QLD) | 4 | 417 | 343 |
| 05.08.2007 Magnetic Island Sunday (QLD) | 2 | 249 | 487 |
| 13.09.2008 MASTERS AND STATE CHALLENGE TROPHY (VIC) | 8 | 487 | 378 |
| 23.05.2010 cranbourne (VIC) | 4 | 471 | 329 |
| Head-to-head after 12 games | 10 | 2 | |
| Average score | 401.75 | 359.91 | |
| Spread: | 502 | -502 | |