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