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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 7y 273d | Berkeley 1968 | |
| 2 | 15y 191d | US Open 1987 | |
| 3 | 16y 9d | US Open 1980 | |
| 4 | 16y 28d | US Open 1983 | |
| 5 | 16y 89d | Australian Open 2009 | |
| 6 | 16y 90d | Roland Garros 1988 | |
| 7 | 16y 119d | Wimbledon 1988 | |
| 8 | 16y 146d | Roland Garros 1984 | |
| 9 | 16y 154d | Johannesburg 1969 | |
| 10 | 16y 181d | Wimbledon 1973 |
