Youngest Players at Top 4
The youngest player ever to enter the ATP Top 4 is Andre Agassi, who first appeared at 18y 3m 3d on 1988-08-01. The second youngest is Bjorn Borg (18y 4m 15d on 1974-10-21). Third is Boris Becker (18y 4m 16d). 19 players in this list entered the Top 4 before their 21st birthday.
| Top | Player | Age at Top 4 | Date |
|---|---|---|---|
| 1 | 18y 3m 3d | 1988-08-01 | |
| 2 | 18y 4m 15d | 1974-10-21 | |
| 3 | 18y 4m 16d | 1986-04-07 | |
| 4 | 19y 0m 3d | 2005-06-06 | |
| 5 | 19y 1m 25d | 1983-10-17 | |
| 6 | 19y 2m 27d | 2022-08-01 | |
| 7 | 19y 8m 15d | 1994-05-16 | |
| 8 | 19y 10m 16d | 1979-01-01 | |
| 9 | 20y 0m 20d | 2007-06-11 | |
| 10 | 20y 3m 23d | 2023-08-21 | |
| 11 | 20y 4m 15d | 2001-07-09 | |
| 12 | 20y 4m 22d | 2017-09-11 | |
| 13 | 20y 5m 15d | 1992-01-27 | |
| 14 | 20y 5m 26d | 1992-08-17 | |
| 15 | 20y 6m 30d | 1986-08-18 | |
| 16 | 20y 7m 15d | 2000-09-11 | |
| 17 | 20y 9m 24d | 1991-06-10 | |
| 18 | 20y 9m 23d | 1992-07-06 | |
| 19 | 20y 11m 12d | 2003-08-11 | |
| 20 | 21y 1m 30d | 1995-04-17 |
