| Date | Tournament | State | Round | Ethel Collins | Ivor Zetler |
|---|---|---|---|---|---|
| 16/01/1993 | Wollongong | NSW | 4 | 324 | 435 |
| 13/02/1993 | St George February | NSW | 4 | 321 | 364 |
| 25/01/1998 | City of Sydney International Masters | NSW | 14 | 305 | 375 |
| 25/01/1998 | City of Sydney International Masters | NSW | 15 | 332 | 373 |
| 25/01/1998 | City of Sydney International Masters | NSW | 16 | 395 | 300 |
| 05/04/1999 | Australian Championships | NSW | 1 | 355 | 429 |
| Head-to-head after 6 games | 1 | 5 | |||
| Average score | 338.67 | 379.33 | |||
| Spread | -244 | 244 | |||