Haas arguably choked, Del Po probably got tired - but so what? Basically all you're saying is that 2 of the tough opponents Fed had in that draw were in such good form they played well enough to beat him. How exactly does that make it easier?
I posted that on paper Fed had a harder draw.
When you don't understand how a choking opponent makes your win easier, well....then you either don't know what the word choking means or it's even worse...