Youngest Players at Year-End No. 9
The youngest player to finish a season ranked No. 9 in ATP history is Goran Ivanisevic, who achieved it at the age of 19y 3m 18d in 1990. The second youngest is Juan Martin del Potro (20y 3m 6d, 2008).
| Rank | Player | Age at EOY No. 9 | Year |
|---|---|---|---|
| 1 | 19y 3m 18d | 1990 | |
| 2 | 20y 3m 6d | 2008 | |
| 3 | 20y 7m 5d | 1989 | |
| 4 | 21y 7m 11d | 1985 | |
| 5 | 22y 7m 9d | 1982 | |
| 6 | 22y 7m 29d | 1992 | |
| 7 | 22y 8m 25d | 2006 | |
| 8 | 22y 9m 17d | 1996 | |
| 9 | 22y 11m 26d | 2004 | |
| 10 | 23y 2m 20d | 2025 | |
| 11 | 23y 11m 7d | 1991 | |
| 12 | 24y 0m 1d | 1999 | |
| 13 | 24y 2m 14d | 1975 | |
| 14 | 24y 3m 10d | 1976 | |
| 15 | 24y 3m 10d | 1995 | |
| 16 | 24y 10m 16d | 2021 | |
| 17 | 25y 1m 28d | 2022 | |
| 18 | 25y 3m 22d | 1998 | |
| 19 | 25y 5m 22d | 1988 | |
| 20 | 25y 9m 16d | 1984 |
