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