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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 18y 151d | Canada Masters 1990 | |
| 2 | 18y 320d | Miami Masters 2022 | |
| 3 | 19y 66d | Canada Masters 2005 | |
| 4 | 19y 136d | Madrid Masters 2005 | |
| 5 | 19y 185d | Paris Masters 2022 | |
| 6 | 19y 197d | Miami Masters 2025 | |
| 7 | 19y 301d | Miami Masters 2007 | |
| 8 | 19y 305d | Indian Wells Masters 2023 | |
| 9 | 19y 321d | Miami Masters 1990 | |
| 10 | 20y 9d | Indian Wells Masters 1992 |
