| Tournament | Round | Margaret Andrews | Chris Ostrowski |
| 24.11.2007 CENTRAL COAST CHAMPS (NSW) | 6 | 290 | 398 |
| 02.03.2008 Balmain BUGS (NSW) | 4 | 377 | 313 |
| 05.07.2009 Winter Challenge (NSW) | 7 | 314 | 376 |
| 05.10.2009 NSW CHAMPIONSHIPS (NSW) | 22 | 355 | 366 |
| 27.02.2010 Matchplay Qualifier (NSW) | 5 | 350 | 470 |
| 19.06.2010 Wollongong WORDS Winter (NSW) | 4 | 249 | 412 |
| 28.08.2011 WSC Rep Fundraiser (NSW) | 3 | 303 | 399 |
| 11.09.2011 BAULKHAM HILLS (NSW) | 4 | 291 | 369 |
| 17.03.2012 Matchplay (NSW) | 3 | 356 | 362 |
| 20.04.2013 Spot Surprize (NSW) | 4 | 311 | 348 |
| Head-to-head after 10 games | 1 | 9 | |
| Average score | 319.6 | 381.3 | |
| Spread: | -617 | 617 | |