Timespan between first and last time ranked No. 1
| Rank | Player | Timespan | First | Last |
|---|---|---|---|---|
| 1 |  Roger Federer | 14y 4m 16d | 2004-02-02 | 2018-06-18 |
| 2 |  Novak Djokovic | 12y 10m 30d | 2011-07-04 | 2024-06-03 |
| 3 |  Rafael Nadal | 11y 5m 9d | 2008-08-18 | 2020-01-27 |
| 4 |  Jimmy Connors | 8y 11m 19d | 1974-07-08 | 1983-06-27 |
| 5 | Andre Agassi | 8y 4m 22d | 1995-04-10 | 2003-09-01 |
| 6 | Pete Sampras | 7y 7m 1d | 1993-04-12 | 2000-11-13 |
| 7 | Ivan Lendl | 7y 5m 9d | 1983-02-28 | 1990-08-06 |
| 8 | John McEnroe | 5y 5m 30d | 1980-03-03 | 1985-09-02 |
| 9 |  Bjorn Borg | 3y 11m 12d | 1977-08-15 | 1981-07-27 |
| 10 | Carlos Alcaraz | 3y 4m 7d | 2022-09-12 | 2026-01-19 |
| 11 | Stefan Edberg | 2y 1m 15d | 1990-08-13 | 1992-09-28 |
| 12 | Jim Courier | 1y 6m 27d | 1992-02-10 | 1993-09-06 |
| 13 |  Lleyton Hewitt | 1y 6m 21d | 2001-11-19 | 2003-06-09 |
| 14 |  Jannik Sinner | 1y 4m 24d | 2024-06-10 | 2025-11-03 |
| 15 |  Gustavo Kuerten | 0y 11m 8d | 2000-12-04 | 2001-11-12 |
| 16 | John Newcombe | 0y 9m 21d | 1973-09-10 | 1974-07-01 |
| 17 |  Andy Murray | 0y 9m 7d | 2016-11-07 | 2017-08-14 |
| 18 |  Ilie Nastase | 0y 9m 7d | 1973-08-20 | 1974-05-27 |
| 19 |  Boris Becker | 0y 7m 5d | 1991-01-28 | 1991-09-02 |
| 20 |  Daniil Medvedev | 0y 6m 8d | 2022-02-28 | 2022-09-05 |