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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 17y 4d | Beckenham 1973 | |
| 2 | 17y 48d | Auckland 1977 | |
| 3 | 17y 200d | Queen's Club 1985 | |
| 4 | 17y 214d | Auckland 1974 | |
| 5 | 17y 214d | Melbourne-2 1982 | |
| 6 | 18y 178d | Adelaide 1974 | |
| 7 | 18y 180d | Beckenham 1972 | |
| 8 | 19y 8d | Brisbane 1970 | |
| 9 | 19y 25d | Sydney-2 1978 | |
| 10 | 19y 123d | Queen's Club 1978 |
