| Tournament | Round | Devorah Ullman | Chris Ostrowski |
| 21.08.2016 Hills Open (NSW) | 1 | 316 | 418 |
| 05.01.2021 oitoo by lake 05012021 (NSW) | 4 | 351 | 397 |
| 13.04.2021 OITOO East Hills (NSW) | 5 | 337 | 377 |
| 21.12.2021 OITOO by river (NSW) | 2 | 419 | 371 |
| 22.04.2023 Wallerawang (NSW) | 4 | 332 | 363 |
| 22.04.2023 Wallerawang (NSW) | 12 | 240 | 526 |
| 26.09.2023 oitoo Spring (NSW) | 3 | 419 | 281 |
| 29.03.2025 LAKE MACQUARIE AUTUMN (NSW) | 3 | 403 | 438 |
| Head-to-head after 8 games | 2 | 6 | |
| Average score | 352.12 | 396.37 | |
| Spread: | -354 | 354 | |