| Tournament | Round | Patricia Mitchell | Sal Costanzo |
| 08.06.1998 Victorian Championships (VIC) | 9 | 418 | 374 |
| 05.07.1998 High Country (VIC) | 9 | 407 | 331 |
| 05.07.1998 High Country (VIC) | 12 | 376 | 468 |
| 05.10.1998 New South Wales Championships (NSW) | 18 | 259 | 399 |
| 07.03.1999 Bendigo (VIC) | 6 | 393 | 363 |
| 21.03.1999 Prahran (VIC) | 3 | 348 | 405 |
| 14.06.1999 Victorian Championships (VIC) | 2 | 493 | 328 |
| 22.08.1999 Bentleigh (VIC) | 6 | 455 | 304 |
| 27.08.2000 Bentleigh (VIC) | 1 | 391 | 441 |
| 25.02.2001 Camberwell (VIC) | 6 | 366 | 404 |
| 04.03.2001 Bendigo (VIC) | 3 | 470 | 339 |
| 09.06.2001 Victorian Championships (VIC) | 15 | 436 | 380 |
| 25.05.2002 Bunny (VIC) | 3 | 352 | 413 |
| 22.02.2003 Ballarat (VIC) | 3 | 305 | 442 |
| 21.04.2003 Australian Championships (SA) | 18 | 424 | 441 |
| 18.05.2003 Dandenong (VIC) | 4 | 394 | 403 |
| 08.06.2003 Victorian Championships (VIC) | 2 | 352 | 373 |
| 27.11.2005 McKinnon (VIC) | 4 | 395 | 370 |
| 18.02.2007 Camberwell (VIC) | 3 | 500 | 302 |
| 01.03.2009 TEAM CHALLENGE (VIC) | 2 | 370 | 387 |
| Head-to-head after 20 games | 9 | 11 | |
| Average score | 395.2 | 383.35 | |
| Spread: | 237 | -237 | |