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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | -14y 113d | Manchester 1968 | |
| 2 | 0y 23d | Sydney-2 1975 | |
| 3 | 9y 101d | Australian Open 1972 | |
| 4 | 10y 101d | Australian Open 1973 | |
| 5 | 11y 101d | Australian Open 1974 | |
| 6 | 14y 201d | Brisbane 1970 | |
| 7 | 15y 51d | Queen's Club 1970 | |
| 8 | 15y 220d | Manchester 1969 | |
| 9 | 15y 227d | Beckenham 1969 | |
| 10 | 15y 234d | Queen's Club 1969 |
