Timespan between first and last time ranked at Year-End No. 9
The longest year-end career span at No. 9 in ATP history belongs to Arthur Ashe: 6 seasons, from 1973 to 1979. Second is Thomas Muster (4 seasons).
| Rank | Player | Timespan (years) | First year | Last year |
|---|---|---|---|---|
| 1 | 6 | 1973 | 1979 | |
| 2 | 4 | 1993 | 1997 | |
| 3 | 4 | 1996 | 2000 | |
| 4 | 3 | 2004 | 2007 | |
| 5 | 2 | 2021 | 2023 | |
| 6 | 2 | 2013 | 2015 | |
| 7 | 1 | 2011 | 2012 | |
| 8 | 1 | 2009 | 2010 | |
| 9 | 1 | 1985 | 1986 | |
| 10 | 0 | 2026 | 2026 | |
| 11 | 0 | 2025 | 2025 | |
| 12 | 0 | 2024 | 2024 | |
| 13 | 0 | 2022 | 2022 | |
| 14 | 0 | 2020 | 2020 | |
| 15 | 0 | 2019 | 2019 | |
| 16 | 0 | 2018 | 2018 | |
| 17 | 0 | 2017 | 2017 | |
| 18 | 0 | 2016 | 2016 | |
| 19 | 0 | 2014 | 2014 | |
| 20 | 0 | 2008 | 2008 |
