I re-watched Calzaghe Vs Kessler the other day. Joe was not being his usual awkward self. He got hit to much being awkward cause he would square up. He took over mid way when he started boxing "text book style". IE he lined up his right shoulder and threw good jabs and combos. And moved out of the way. His speed was definitely a factor but wasn't a huge disparity. (Side note. The difference between Calzaghe and Roy Jones is the fact that Calzaghe knew fundamentals and Jones solely relied upon athleticism. ) And I did give Kessler the 12th round. Calzaghe has more power than anyone ever gives him credit for and can take a punch from pretty much anyone. It isn't like Kessler didnt hurt him. To me that was one of the best fights ever. 2 men. Equally matched. Not giving in. giving everything they had. If I recall I had it for Joe by 3 points.
Basically. There's your patented Calzaghe "adjustment." He shortens up his shots and converts himself back into an amateur.
Calzghe is great, and in that fight was very great... once he figured out Kessler , he adjusted and used his in and out movement with the jab to completely freeze Kessler up and also took him completely away from his gameplan... The Rhythm that Calzaghe had in that fight gave Kessler all sorts of trouble
In a word...rhythm. Calzaghe started off with a more standard southpaw approach, and was getting caught too much, losing rounds. So he changed rhythm and "got there first" as they say, for most of the rest of the fight.
Calzaghe was immense that night. All this **** about him slapping pays him a complment. He still managed to win despite not being able to punch like he wanted. He was very clever that night after looking like being at the end of a pummeling. Kept calm, found another way and frustrated the **** out of a hard guy not used to losing.