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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 17y 96d | Roland Garros 1989 | |
| 2 | 17y 214d | Wimbledon 1985 | |
| 3 | 17y 274d | Roland Garros 1982 | |
| 4 | 17y 361d | Roland Garros 1974 | |
| 5 | 18y 213d | Wimbledon 1986 | |
| 6 | 18y 273d | Roland Garros 1983 | |
| 7 | 18y 354d | Roland Garros 2005 | |
| 8 | 18y 362d | Roland Garros 1975 | |
| 9 | 19y 15d | US Open 1990 | |
| 10 | 19y 98d | Australian Open 1983 | |
| 11 | 19y 116d | US Open 2022 | |
| 12 | 19y 310d | Australian Open 1985 | |
| 13 | 19y 360d | Roland Garros 2006 | |
| 14 | 20y 14d | Wimbledon 1976 | |
| 15 | 20y 23d | Wimbledon 2006 | |
| 16 | 20y 28d | Roland Garros 1990 | |
| 17 | 20y 59d | Wimbledon 2023 | |
| 18 | 20y 86d | US Open 1976 | |
| 19 | 20y 96d | Australian Open 1984 | |
| 20 | 20y 97d | US Open 2007 |
