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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 0y 211d | US Open 1969 | |
| 2 | 9y 101d | Australian Open 1972 | |
| 3 | 10y 101d | Australian Open 1973 | |
| 4 | 11y 101d | Australian Open 1974 | |
| 5 | 15y 248d | US Open 1972 | |
| 6 | 16y 78d | Australian Championships 1968 | |
| 7 | 16y 84d | US Open 1972 | |
| 8 | 16y 119d | Wimbledon 1988 | |
| 9 | 16y 149d | Australian Open 1983 | |
| 10 | 16y 181d | Wimbledon 1973 | |
| 11 | 16y 199d | Australian Open 1982 | |
| 12 | 16y 211d | Australian Open 1981 | |
| 13 | 16y 215d | Wimbledon 1984 | |
| 14 | 16y 239d | Wimbledon 1970 | |
| 15 | 16y 246d | US Open 1973 | |
| 16 | 16y 260d | Australian Open 1985 | |
| 17 | 16y 280d | Wimbledon 1988 | |
| 18 | 16y 283d | Australian Open 1987 | |
| 19 | 16y 303d | Wimbledon 1981 | |
| 20 | 16y 318d | Australian Championships 1968 |
