Sounds like he didnt have the fitness.
A lot of seeds lost in the 2nd round. That extra match on court produces a lot of upsets i reckon. Fed wasnt great today either.
Novak is 31 in May. His last slam was Paris 2016. He is now on a run of 7 slams without a win. I haven't done the stats on this but it would be interesting to know if any among previous players have gone on a 2 year slam famine aged 29 to 31 and returned to winning multiple slams at 31 or older.
I doubt its been done. If it has been done it is extremely rare.......history says he may well be finished.