| Tournament | Round | Gillian Briggs | John Spaan |
| 12.09.1998 September (SA) | 3 | 390 | 293 |
| 16.01.1999 January (SA) | 6 | 363 | 364 |
| 21.03.1999 March (SA) | 4 | 369 | 354 |
| 24.09.2006 Australian Masters and State Challenge Trophy (NSW) | 16 | 301 | 441 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 355.75 | 363 | |
| Spread: | -29 | 29 | |