| Tournament | Round | Ian Close | Zina Costanzo |
| 05.10.1998 New South Wales Championships (NSW) | 16 | 348 | 428 |
| 21.01.1999 City of Sydney Masters (NSW) | 6 | 335 | 385 |
| 01.08.1999 Winter Masters (NSW) | 5 | 440 | 346 |
| 27.01.2002 City of Sydney International Masters (NSW) | 6 | 405 | 361 |
| 12.04.2004 Australian Championships (ACT) | 20 | 402 | 394 |
| Head-to-head after 5 games | 3 | 2 | |
| Average score | 386 | 382.8 | |
| Spread: | 16 | -16 | |