Timespan between first and last time ranked No. 9
The longest career span at No. 9 in ATP history belongs to Roger Federer: 19y 3m 24d, from 2002-06-17 to 2021-10-11. Second is Jimmy Connors (15y 7m 0d). Third is Andre Agassi (13y 8m 7d). The list includes 164 players in total. 9 of them spanned more than a decade at No. 9.
| Rank | Player | Timespan | First | Last |
|---|---|---|---|---|
| 1 | 19y 3m 24d | 2002-06-17 | 2021-10-11 | |
| 2 | 15y 7m 0d | 1973-09-10 | 1989-04-10 | |
| 3 | 13y 8m 7d | 1992-07-06 | 2006-03-13 | |
| 4 | 12y 7m 11d | 1980-08-25 | 1993-04-05 | |
| 5 | 12y 0m 27d | 1978-09-25 | 1990-10-22 | |
| 6 | 11y 7m 3d | 2009-03-02 | 2020-10-05 | |
| 7 | 10y 7m 28d | 2008-10-06 | 2019-06-03 | |
| 8 | 10y 3m 28d | 1991-06-24 | 2001-10-22 | |
| 9 | 10y 3m 21d | 2014-07-07 | 2024-10-28 | |
| 10 | 9y 11m 26d | 1985-02-18 | 1995-02-13 | |
| 11 | 9y 6m 30d | 2008-06-09 | 2018-01-08 | |
| 12 | 9y 6m 15d | 1974-08-26 | 1984-03-12 | |
| 13 | 9y 1m 27d | 2007-08-20 | 2016-10-17 | |
| 14 | 8y 11m 26d | 1985-07-29 | 1994-07-25 | |
| 15 | 8y 8m 19d | 1989-04-24 | 1998-01-12 | |
| 16 | 8y 2m 27d | 2002-08-05 | 2010-11-01 | |
| 17 | 8y 2m 29d | 1997-01-27 | 2005-04-25 | |
| 18 | 7y 10m 30d | 1974-07-08 | 1982-06-07 | |
| 19 | 7y 9m 4d | 2008-04-21 | 2016-01-25 | |
| 20 | 7y 7m 10d | 2015-08-03 | 2023-03-13 |
