Youngest Players at Top 20
The youngest player ever to enter the ATP Top 20 is Aaron Krickstein, who first appeared at 16y 11m 21d on 1984-07-23. The second youngest is Michael Chang (17y 2m 16d on 1989-05-08). Third is Bjorn Borg (17y 4m 9d). 72 players in this list entered the Top 20 before their 21st birthday.
| Top | Player | Age at Top 20 | Date |
|---|---|---|---|
| 1 | 16y 11m 21d | 1984-07-23 | |
| 2 | 17y 2m 16d | 1989-05-08 | |
| 3 | 17y 4m 9d | 1973-10-15 | |
| 4 | 17y 6m 26d | 1985-06-17 | |
| 5 | 17y 9m 2d | 1982-05-24 | |
| 6 | 17y 9m 17d | 1988-02-15 | |
| 7 | 17y 10m 4d | 1987-08-24 | |
| 8 | 18y 2m 7d | 1984-03-26 | |
| 9 | 18y 2m 9d | 1982-10-25 | |
| 10 | 18y 5m 1d | 1993-02-01 | |
| 11 | 18y 6m 14d | 1990-02-26 | |
| 12 | 18y 7m 17d | 1977-10-03 | |
| 13 | 18y 8m 19d | 1986-09-22 | |
| 14 | 18y 9m 16d | 2022-02-21 | |
| 15 | 18y 10m 1d | 2005-04-04 | |
| 16 | 18y 10m 10d | 1990-07-23 | |
| 17 | 18y 10m 24d | 2000-01-17 | |
| 18 | 18y 11m 21d | 2001-08-20 | |
| 19 | 19y 0m 2d | 2005-06-20 | |
| 20 | 19y 0m 11d | 2019-08-19 |
