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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 18y 312d | Monte Carlo Masters 2005 | |
| 2 | 18y 333d | Rome Masters 2005 | |
| 3 | 18y 362d | Madrid Masters 2022 | |
| 4 | 19y 230d | Monte Carlo Masters 1994 | |
| 5 | 19y 244d | Hamburg Masters 1994 | |
| 6 | 19y 318d | Monte Carlo Masters 2006 | |
| 7 | 19y 339d | Rome Masters 2006 | |
| 8 | 19y 354d | Madrid Masters 2023 | |
| 9 | 20y 24d | Rome Masters 2017 | |
| 10 | 20y 96d | Monte Carlo Masters 1991 |
