| Player |
Country |
Start Date |
End Date |
Weeks |
| Marat Safin |
RUS |
January 29, 2001 |
February 25, 2001 |
4 |
| Gustavo Kuerten |
BRA |
February 26, 2001 |
April 1, 2001 |
5 |
| Marat Safin |
RUS |
April 2, 2001 |
April 22, 2001 |
3 |
| Gustavo Kuerten |
BRA |
April 23, 2001 |
November 18, 2001 |
30 |
| Lleyton Hewitt |
AUS |
November 19, 2001 |
April 27, 2003 |
75 |
| Andre Agassi |
USA |
April 28, 2003 |
May 11, 2003 |
2 |
| Lleyton Hewitt |
AUS |
May 12, 2003 |
June 15, 2003 |
5 |
| Andre Agassi |
USA |
June 16, 2003 |
September 7, 2003 |
12 |
| Juan Carlos Ferrero |
ESP |
September 8, 2003 |
November 2, 2003 |
8 |
| Andy Roddick |
USA |
November 3, 2003 |
February 1, 2004 |
13 |
| Roger Federer |
SUI |
February 2, 2004 |
August 17, 2008 |
237 |
| Rafael Nadal |
ESP |
August 18, 2008 |
July 5, 2009 |
46 |
| Roger Federer |
SUI |
July 6, 2009 |
June 6, 2010 |
48 |
| Rafael Nadal |
ESP |
June 7, 2010 |
July 3, 2011 |
56 |
| Novak Djokovic |
SRB |
July 4, 2011 |
Present 34 |
34 |
|
