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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 16y 306d | Canada Masters 2005 | |
| 2 | 17y 12d | Indian Wells Masters 1998 | |
| 3 | 17y 13d | Miami Masters 2026 | |
| 4 | 17y 96d | Miami Masters 1990 | |
| 5 | 17y 101d | Canada Masters 2016 | |
| 6 | 17y 131d | Madrid Masters 2003 | |
| 7 | 17y 140d | Canada Masters 1999 | |
| 8 | 17y 155d | Miami Masters 2015 | |
| 9 | 17y 202d | Miami Masters 2000 | |
| 10 | 17y 208d | Indian Wells Masters 2018 |
