| Tournament | Round | Alastair Richards | Chris Ostrowski |
| 27.02.2010 Matchplay Qualifier (NSW) | 7 | 423 | 369 |
| 21.11.2010 Central Coast Championships (NSW) | 4 | 482 | 364 |
| 27.02.2011 Matchplay Qualifier (NSW) | 4 | 472 | 433 |
| 01.10.2012 NSW Championships (NSW) | 1 | 439 | 224 |
| 21.04.2014 Australian Championship (NSW) | 3 | 380 | 334 |
| 26.07.2015 Winter Masters (NSW) | 3 | 523 | 335 |
| 31.01.2016 CSIM 2016 (NSW) | 1 | 442 | 401 |
| 29.01.2017 City of Sydney International Masters (NSW) | 7 | 514 | 325 |
| Head-to-head after 8 games | 8 | 0 | |
| Average score | 459.37 | 348.12 | |
| Spread: | 890 | -890 | |