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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | -26y 313d | Dublin 1968 | |
| 2 | 14y 201d | Brisbane 1970 | |
| 3 | 15y 45d | Buenos Aires 1985 | |
| 4 | 15y 66d | Rye Brook 1988 | |
| 5 | 15y 71d | Boca Raton 1975 | |
| 6 | 15y 110d | Mexico City 1969 | |
| 7 | 15y 225d | Scottsdale 1987 | |
| 8 | 15y 227d | Tampa 1980 | |
| 9 | 15y 227d | Beckenham 1969 | |
| 10 | 15y 308d | Madrid 1972 |
