David Haye and Takam have said that AJ doesn't do proper sparring, instead he just does technical drills with sparring partners. So AJ getting dropped may be a fake story. He will not improve if this is how he trains. The only other fighter I have heard of that didn't like sparring was Rhonda Rousey. She would not spar when she was training her stand up game. Now she fights in the WWE, so maybe Joshua could join her if he loses the rematch.