Djokovic was pretty close at slams though, and better at masters+WTF....
Djokovic's dominance on hard court slams has never reached the height of Federer's, but in a longer span he performed well throughout his most important years
His performance on masters events has been lackluster in the past serveral years, which is still comparable to most of Federer's career. The gap is too huge that Federer looks like a second tier player
Sheet1 player\age,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38 Federer hard court slams,0,0,0,2,1,2,2,1,0,1,0,0,0,0,0,0,1,1,0 0,0,0,2,3,5,7,8,8,9,9,9,9,9,9,9,10,11,11 Djokovic hard court slams,0,1,0,0,2,1,1,0,2,1,0,1,1,1 1,1,1,3,4,5,5,7,8,8,9,10,11 Federer hard court masters,0,0,0,2,3,4docs.google.com