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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 16y 222d | Adelaide 1982 | |
| 2 | 17y 4d | Beckenham 1973 | |
| 3 | 17y 4d | Australian Open 1984 | |
| 4 | 17y 18d | Wimbledon 1973 | |
| 5 | 17y 48d | Auckland 1977 | |
| 6 | 17y 159d | Australian Open 1976 | |
| 7 | 17y 179d | Perth 1969 | |
| 8 | 17y 188d | Australian Open 1982 | |
| 9 | 17y 200d | Queen's Club 1985 | |
| 10 | 17y 206d | Adelaide-2 1982 | |
| 11 | 17y 214d | Melbourne-2 1982 | |
| 12 | 17y 214d | Auckland 1974 | |
| 13 | 17y 214d | Wimbledon 1985 | |
| 14 | 17y 221d | Beckenham 1970 | |
| 15 | 17y 236d | South Orange 1974 | |
| 16 | 17y 251d | Stuttgart 2025 | |
| 17 | 17y 252d | Newport 1971 | |
| 18 | 17y 256d | Haverford 1974 | |
| 19 | 17y 256d | Hoylake 1970 | |
| 20 | 17y 261d | Adelaide 1968 |
