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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 15y 301d | Monte Carlo Masters 2002 | |
| 2 | 16y 149d | Stockholm Masters 1992 | |
| 3 | 16y 299d | Monte Carlo Masters 2003 | |
| 4 | 16y 306d | Canada Masters 2005 | |
| 5 | 16y 314d | Monte Carlo Masters 2003 | |
| 6 | 16y 342d | Hamburg Masters 2003 | |
| 7 | 17y 9d | Monte Carlo Masters 1991 | |
| 8 | 17y 12d | Indian Wells Masters 1998 | |
| 9 | 17y 96d | Miami Masters 1990 | |
| 10 | 17y 101d | Canada Masters 2016 |
