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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 7y 273d | Berkeley 1968 | |
| 2 | 15y 73d | US Open 1988 | |
| 3 | 15y 191d | US Open 1987 | |
| 4 | 15y 227d | Indian Wells Masters 2005 | |
| 5 | 15y 241d | Miami Masters 2005 | |
| 6 | 15y 323d | Australian Open 1997 | |
| 7 | 16y 9d | US Open 1980 | |
| 8 | 16y 28d | US Open 1983 | |
| 9 | 16y 36d | US Open 2005 | |
| 10 | 16y 89d | Australian Open 2009 | |
| 11 | 16y 104d | Australian Open 1988 | |
| 12 | 16y 119d | US Open 1986 | |
| 13 | 16y 126d | US Open 1981 | |
| 14 | 16y 146d | Johannesburg 1971 | |
| 15 | 16y 154d | Johannesburg 1969 | |
| 16 | 16y 172d | Miami Masters 2024 | |
| 17 | 16y 188d | US Open 1988 | |
| 18 | 16y 195d | Johannesburg 1971 | |
| 19 | 16y 208d | Australian Open 2003 | |
| 20 | 16y 226d | Indian Wells Masters 2006 |
