| Tournament | Round | Marge Roberts | Thanu Sriskantharaja |
| 05.11.2023 November Bisection (WA) | 3 | 398 | 311 |
| 11.02.2024 February Bisection (WA) | 2 | 395 | 288 |
| 06.10.2024 October Bisection (WA) | 3 | 375 | 357 |
| 07.12.2025 Graham Bell Memorial (WA) | 4 | 377 | 326 |
| Head-to-head after 4 games | 4 | 0 | |
| Average score | 386.25 | 320.5 | |
| Spread: | 263 | -263 | |