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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 15y 45d | Buenos Aires 1985 | |
| 2 | 15y 71d | Boca Raton 1975 | |
| 3 | 15y 110d | Mexico City 1969 | |
| 4 | 15y 308d | Madrid 1972 | |
| 5 | 15y 326d | Bastad 1980 | |
| 6 | 15y 330d | Mallorca 2002 | |
| 7 | 15y 342d | Boca Raton 1975 | |
| 8 | 15y 342d | Houston 2008 | |
| 9 | 16y 33d | Bastad 1972 | |
| 10 | 16y 70d | Forest Hills 1988 | |
| 11 | 16y 78d | Buenos Aires-2 1968 | |
| 12 | 16y 124d | Florence 1984 | |
| 13 | 16y 139d | Palermo 1981 | |
| 14 | 16y 146d | Geneva 1981 | |
| 15 | 16y 149d | Mexico City 1968 | |
| 16 | 16y 155d | Athens 1986 | |
| 17 | 16y 173d | Munich 1984 | |
| 18 | 16y 191d | Mexico City 1981 | |
| 19 | 16y 201d | Hilversum 1984 | |
| 20 | 16y 226d | Stuttgart 1989 |
