Youngest Players at Top 100
The youngest player ever to enter the ATP Top 100 is Aaron Krickstein, who first appeared at 16y 2m 15d on 1983-10-17. The second youngest is Michael Chang (16y 3m 15d on 1988-06-06). Third is Andre Agassi (16y 5m 14d). 100 players in this list entered the Top 100 before their 21st birthday.
| Top | Player | Age at Top 100 | Date |
|---|---|---|---|
| 1 | 16y 2m 15d | 1983-10-17 | |
| 2 | 16y 3m 15d | 1988-06-06 | |
| 3 | 16y 5m 14d | 1986-10-13 | |
| 4 | 16y 10m 18d | 2003-04-21 | |
| 5 | 17y 0m 1d | 1981-08-17 | |
| 6 | 17y 0m 18d | 1984-12-10 | |
| 7 | 17y 0m 28d | 1986-11-17 | |
| 8 | 17y 2m 14d | 1973-08-20 | |
| 9 | 17y 2m 18d | 1981-11-09 | |
| 10 | 17y 2m 24d | 1980-10-06 | |
| 11 | 17y 2m 28d | 1982-07-26 | |
| 12 | 17y 3m 2d | 1987-04-13 | |
| 13 | 17y 3m 9d | 1988-11-21 | |
| 14 | 17y 3m 11d | 2003-09-29 | |
| 15 | 17y 4m 14d | 1990-04-23 | |
| 16 | 17y 5m 29d | 1983-07-18 | |
| 17 | 17y 6m 0d | 1989-03-13 | |
| 18 | 17y 6m 16d | 1982-12-13 | |
| 19 | 17y 6m 26d | 1985-07-29 | |
| 20 | 17y 7m 4d | 1974-07-29 |
