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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 15y 255d | Roland Garros 1983 | |
| 2 | 15y 306d | Fort Lauderdale 1971 | |
| 3 | 15y 343d | Roland Garros 2002 | |
| 4 | 16y 4d | Roland Garros 1968 | |
| 5 | 16y 90d | Roland Garros 1988 | |
| 6 | 16y 108d | Cincinnati 1969 | |
| 7 | 16y 146d | Roland Garros 1984 | |
| 8 | 16y 170d | Roland Garros 1989 | |
| 9 | 16y 207d | Madrid Masters 2024 | |
| 10 | 16y 215d | Roland Garros 2009 | |
| 11 | 16y 261d | Roland Garros 1984 | |
| 12 | 16y 268d | US Open 1976 | |
| 13 | 16y 276d | Rome 1968 | |
| 14 | 16y 281d | Roland Garros 1981 | |
| 15 | 16y 299d | Roland Garros 1984 | |
| 16 | 16y 307d | Rome 1968 | |
| 17 | 16y 318d | Roland Garros 1980 | |
| 18 | 16y 326d | Roland Garros 1980 | |
| 19 | 16y 327d | Roland Garros 1968 | |
| 20 | 16y 341d | Roland Garros 2003 |