Just simply a masterclass of the art of boxing from the lighter and smaller cruiser weight. If it ever came down to boxing skill there was always no contest, Aleksandr Usyk is a much more natural and gifted fighter than Joshua, Pound for pound there's no better fighter and he's much more than just a level or so sbove, they're not even comparable.
For me there has always been questions about the mega hype around Joshua ever since he lost to the smaller in stature, and clearly heavily overweight, Anthony 'Doughnut boy' Ruiz aka Fatty to his mates. Joshua may have blamed complacency and poor preparation but that was meant to be a hand picked formality, one he should have won half asleep.
I don't see any way Joshua can ever win against the far superior boxer especially if Usyk gets his wish and it's in the Olympic Stadium in Kiev, Ukraine.
The bigger question is whether the cruiser weight can be equally effective against a real heavy weight who is a far better boxer than Joshua. Usyk would still have the beating of Fury in boxing ability but the chasm wouldn't be as wide as Fury is far better than Joshua for boxing ability. Fury couldn't be so passive as Joshua and would have to make his greater weight and power tell early on. Fury v Wilder Iii could make it all academic although Fury must be favourite do him again.