Thread title ought to be changed. Fed has not broken the all time weeks at #1 record.
The Open Era record, yes, but not the all time record.
1. Pancho Gonzales- 364 weeks
2. Bill Tilden- 330 weeks
3. Don Budge- 303 weeks
4. Roger Federer- 299 weeks
He ought to pass or at least tie Budge in the next few weeks, and may tie Tilden next year. Gonzales will be tough to catch, but not impossible.
There was no weekly №1 rankings before 1973. Prior to that the rankings were determined on a year end basis.
So Pancho has the all time YE record
Roger has the all time weekly