| Tournament | Round | Sal Costanzo | Gloria Gallagher |
| 25.01.1998 City of Sydney International Masters (NSW) | 11 | 295 | 394 |
| 08.06.1998 Victorian Championships (VIC) | 17 | 433 | 400 |
| 05.10.1998 New South Wales Championships (NSW) | 11 | 263 | 413 |
| 01.08.1999 Winter Masters (NSW) | 2 | 344 | 346 |
| 27.01.2001 City of Sydney International Masters (NSW) | 8 | 357 | 414 |
| 27.01.2002 City of Sydney International Masters (NSW) | 6 | 404 | 326 |
| 27.01.2002 City of Sydney International Masters (NSW) | 18 | 439 | 313 |
| Head-to-head after 7 games | 3 | 4 | |
| Average score | 362.14 | 372.28 | |
| Spread: | -71 | 71 | |