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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | -12y 20d | Kitzbuhel 1970 | |
| 2 | -11y 323d | Istanbul 1975 | |
| 3 | 8y 238d | Barcelona 1968 | |
| 4 | 9y 259d | Washington 1969 | |
| 5 | 10y 35d | Vina del Mar 1981 | |
| 6 | 10y 336d | Santiago 1981 | |
| 7 | 12y 176d | Miami 1977 | |
| 8 | 13y 276d | St. Petersburg 1968 | |
| 9 | 14y 90d | Mexico City 1968 | |
| 10 | 14y 165d | Prague 1989 |
