Federer tied the mark with the release of Monday's rankings. He's been atop rankings since Feb. 2, 2004. Connors reigned from July 1974 to August 1977. The ATP began ranking players in August 1973.
Considering Federer has 8,120 ranking points -- 3,415 more than second-ranked Rafael Nadal of Spain and 5,295 more than No. 3 Nikolay Davydenko -- it will be some time before he loses to No. 1 ranking.
The latest rankings find Andy Roddick in fourth place followed by and Fernando Gonzalez. James Blake is sixth and Tommy Robredo is seventh. Ivan Ljubicic, Tommy Haas and David Nalbandian round out the Top 10.