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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | -12y 20d | Kitzbuhel 1970 | |
| 2 | 8y 238d | Barcelona 1968 | |
| 3 | 9y 259d | Washington 1969 | |
| 4 | 10y 294d | Johannesburg-2 1976 | |
| 5 | 14y 201d | Brisbane 1970 | |
| 6 | 15y 110d | Mexico City 1969 | |
| 7 | 15y 227d | Beckenham 1969 | |
| 8 | 15y 301d | Monte Carlo Masters 2002 | |
| 9 | 15y 301d | La Quinta 1986 | |
| 10 | 15y 308d | Madrid 1972 |
