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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 17y 101d | Canada Masters 2016 | |
| 2 | 17y 230d | Cincinnati Masters 1990 | |
| 3 | 17y 278d | Indian Wells Masters 2004 | |
| 4 | 17y 292d | Miami Masters 2004 | |
| 5 | 17y 362d | Canada Masters 2018 | |
| 6 | 18y 11d | Indian Wells Masters 1999 | |
| 7 | 18y 84d | Indian Wells Masters 1991 | |
| 8 | 18y 85d | Canada Masters 1991 | |
| 9 | 18y 92d | Cincinnati Masters 2005 | |
| 10 | 18y 114d | Canada Masters 2017 |
