I read that he has injured his hands, or somewhat of a broken knuckles, ouch, maybe he injured it when he knocks down Fury. But he has a history as well with fragile hands. If I'm not mistaken, he has injured if in the first and second fight as well.
So he might as well not think about fighting for the time being, better let that heal for a while and then plan his strategy if ever he wants to comeback.
I think the injury is not that serious though, it will heal in time but what's more important is that his emotional wounds to heal as he would never come back on the winning track again if he still allows himself to be tied with his loss on Fury. He has to move on and accept and he can never beat Fury, but he can still fight other fighters that would help him continue to grow his finances in boxing and cement his legacy as well.