The problem with Federer were his fisrt years [1999-2003] he didn't have the early succes like the other players his winning percentage until 2003 was 68.21% really low for a Top Player, he had a lot of losing H2H by that date [Nalbandian, Hewitt, Agassi, Rafter, Haas]. To be honest I will be surprised if he reitre with a better percenatge than 80
That's because from 1999-2003, Safin, Hewitt, Agassi, Rafter, Henman, and Haas were at their peaks.
Safin was USO champion.
Hewitt was twice YE#1
Agassi had that amazing year in 1999 and another one in 2001.
Rafter was irrelevant after 2001
Henman stopped playing well after 2004, which was ("coincidentally") the year Fraud started to peak on tour)
Haas reached the Olympic final in 2000
Safin, Hewitt, Haas, and Nalbandian then started to have injury problems, right around the time Fraud was "peaking"