Khan needs to work on his footwork (not that he has bad footwork) and maybe think twice about just rushing in and pummeling his man.

I doubt you'll see Khan using some kind of fool proof defence mechanism so i think Khan need sto learn to controll fighters as well as just knocking em out. His power is coming along nicely, it seems.
Like Chavez, he's developing quite a big frame.

I think Chavez looks a little more composed. More variety too.