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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 19y 15d | US Open 1990 | |
| 2 | 19y 116d | US Open 2022 | |
| 3 | 20y 97d | US Open 2007 | |
| 4 | 20y 120d | US Open 1990 | |
| 5 | 20y 139d | Australian Open 1997 | |
| 6 | 20y 184d | US Open 2001 | |
| 7 | 20y 192d | US Open 1979 | |
| 8 | 20y 212d | Australian Open 2006 | |
| 9 | 20y 214d | US Open 2000 | |
| 10 | 20y 237d | Australian Open 2008 |
