| Tournament | Round | Ivor Zetler | Sal Costanzo |
| 25.01.1998 City of Sydney International Masters (NSW) | 5 | 325 | 364 |
| 08.09.2002 Beecroft Marathon (NSW) | 12 | 540 | 326 |
| 07.10.2002 New South Wales Championships (NSW) | 4 | 422 | 305 |
| 27.01.2003 City of Sydney International Masters (NSW) | 6 | 411 | 319 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 424.5 | 328.5 | |
| Spread: | 384 | -384 | |