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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 18y 114d | Canada Masters 2017 | |
| 2 | 18y 151d | Canada Masters 1990 | |
| 3 | 18y 165d | Cincinnati Masters 1990 | |
| 4 | 18y 201d | Miami Masters 2001 | |
| 5 | 18y 216d | Miami Masters 1990 | |
| 6 | 18y 221d | Miami Masters 2019 | |
| 7 | 18y 291d | Miami Masters 2005 | |
| 8 | 18y 306d | Indian Wells Masters 2022 | |
| 9 | 18y 320d | Miami Masters 2022 | |
| 10 | 18y 334d | Canada Masters 2001 |
