We should be appreciative of Federer though, because we will never see anything like him again. The fact he can still compete for slams ever after the erosion of his physical skills is really a greater testament to the natural talent he has than the period of time when he was dominating the tour.
As a Del Potro fan that was quite sad to see but I did expect it but definitely not after they came back on court today, would have thought it would come perhaps after a set and a half of play today or so. On the bright side at least in the second set he showed us what he’s capable of against the big guys when playing well and we can only hope his body holds up and he’s able to play like that week in and week out in some time. Only sad thing is like you said he got to hard on himself after not converting either of those 2 break points and well that was it.
As for Djokovic, well he didn’t have to do much besides be solid and he did that well so congrats to him, definitely can’t see anyone beating him before the final as well, take the title Novak!