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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 0y 211d | US Open 1969 | |
| 2 | 7y 273d | Berkeley 1968 | |
| 3 | 15y 73d | US Open 1988 | |
| 4 | 15y 191d | US Open 1987 | |
| 5 | 15y 227d | Indian Wells Masters 2005 | |
| 6 | 15y 241d | Miami Masters 2005 | |
| 7 | 15y 248d | US Open 1972 | |
| 8 | 15y 255d | Roland Garros 1983 | |
| 9 | 15y 306d | Fort Lauderdale 1971 | |
| 10 | 15y 323d | Australian Open 1997 | |
| 11 | 15y 343d | Roland Garros 2002 | |
| 12 | 16y 4d | Roland Garros 1968 | |
| 13 | 16y 9d | US Open 1980 | |
| 14 | 16y 28d | US Open 1983 | |
| 15 | 16y 36d | US Open 2005 | |
| 16 | 16y 89d | Australian Open 2009 | |
| 17 | 16y 90d | Roland Garros 1988 | |
| 18 | 16y 104d | Australian Open 1988 | |
| 19 | 16y 108d | Cincinnati 1969 | |
| 20 | 16y 119d | Wimbledon 1988 |
