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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 16y 261d | Prague 1996 | |
| 2 | 17y 8d | Geneva 1991 | |
| 3 | 17y 33d | Bastad 2003 | |
| 4 | 17y 47d | Umag 2003 | |
| 5 | 17y 127d | Nice 1990 | |
| 6 | 17y 152d | Prague 1995 | |
| 7 | 17y 237d | Bucharest 2024 | |
| 8 | 17y 239d | Munich 1992 | |
| 9 | 17y 242d | Buenos Aires 2004 | |
| 10 | 17y 248d | Umag 2014 |
