I think the weak era thing is overblown and guys like roddick, Hewitt and old Agassi didn't actually "suck". they were good Players and fed beat them because he was a beast. However let's asume that fed played his whole career against Young roddick,hewitt, coria, old Agassi and other guys of that era. fed is certainly not as good as he was in his prime but he is still a great Player. he regularly spanks top10 Players. would 31 yo fed still win 2-3 slams a year against those guys? or would he also struggle? what number of slams would he have won?