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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 17y 214d | Wimbledon 1985 | |
| 2 | 18y 213d | Wimbledon 1986 | |
| 3 | 19y 98d | Australian Open 1983 | |
| 4 | 19y 310d | Australian Open 1985 | |
| 5 | 20y 14d | Wimbledon 1976 | |
| 6 | 20y 59d | Wimbledon 2023 | |
| 7 | 20y 96d | Australian Open 1984 | |
| 8 | 20y 357d | Australian Open 1987 | |
| 9 | 21y 13d | Wimbledon 1977 | |
| 10 | 21y 57d | Wimbledon 2024 |
