he did when the opponent was intinmidating , Grant ,Golota , Briggs if this turned into a pure boxing match Wlad could well take it as i think he's a smidge faster than Lennox was but if Lennox thought the other guy could hurt him ( as Wlad could ) he went for the quick ko and I dont think even the improved Wlad chin is holidng up to a truly determied Lewis.