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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 | |
| 11 | 17y 130d | Paris Masters 2003 | |
| 12 | 17y 131d | Madrid Masters 2003 | |
| 13 | 17y 134d | Monte Carlo Masters 1990 | |
| 14 | 17y 140d | Canada Masters 1999 | |
| 15 | 17y 148d | Hamburg Masters 1990 | |
| 16 | 17y 155d | Miami Masters 2015 | |
| 17 | 17y 171d | Monte Carlo Masters 2010 | |
| 18 | 17y 202d | Miami Masters 2000 | |
| 19 | 17y 208d | Indian Wells Masters 2018 | |
| 20 | 17y 221d | Stockholm Masters 1991 |
