Anthony Joshua’s trainer, Ben Davison, believes the boxing star ‘wasn’t thinking straight’ in the final stages of his fight with Daniel Dubois on Saturday night. AJ had gone into the showdown hoping to continue his recent resurgence and to become a three-time world champion. Yet that didn’t happen, with Dubois superior throughout the clash as he claimed the biggest victory of his career. Joshua was floored multiple times throughout the bout before finally succumbing to defeat in the fifth round. Davison, speaking at the post-fight press conference, admitted Joshua struggled right from the star…