| Tournament | Round | Gladys Sharp | | Siva Sivapalasundram |
| 23.10.1999 Spring Marathon (NSW) | 7 | 377 | 368 |
| 23.10.1999 Spring Marathon (NSW) | 11 | 329 | 410 |
| 28.03.2016 Australian Championship (SA) | 2 | 416 | 396 |
| 13.12.2020 RETURN II (VIC) | 5 | 356 | 353 |
| 03.04.2021 OZ CHAMPS (NSW) | 11 | 304 | 395 |
| 03.04.2021 OZ CHAMPS (NSW) | 15 | 257 | 428 |
| 21.11.2021 Scrabble Festival (VIC) | 3 | 406 | 378 |
| 05.12.2021 Vic December (VIC) | 3 | 351 | 409 |
| 28.12.2021 Decathon 21 (VIC) | 4 | 359 | 384 |
| 18.06.2022 Toowoomba June (QLD) | 8 | 171 | 397 |
| 21.08.2022 Qld Championship (QLD) | 16 | 288 | 410 |
| 10.09.2022 Toowoomba Spring (QLD) | 1 | 247 | 474 |
| 11.12.2022 G Bell Memorial (WA) | 1 | 310 | 327 |
| Head-to-head after 13 games | 4 | 9 | |
| Average score | 320.84 | 394.53 | |
| Spread: | -958 | 958 | |