| Tournament | Round | Chris May | Zina Costanzo |
| 30.01.2000 City of Sydney International Masters (NSW) | 2 | 390 | 361 |
| 30.01.2000 City of Sydney International Masters (NSW) | 17 | 407 | 370 |
| 07.09.2002 St George (NSW) | 2 | 406 | 407 |
| 02.05.2004 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 8 | 433 | 351 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 409 | 372.25 | |
| Spread: | 147 | -147 | |