Can't really see this going more than 4 or 5. If it does, its because Klitchsko lets it by wasting time with the jab and circle method. Sooner or later, vitali will start with the 1,2's and clinch Arreola. Once Arreola starts suckin wind, it will be the 1,2's and the shoves. Maybe Chris has a shot if he doesn't stop punching and loops one over an outstretched shove or clinch attempt. Firing from the outside, he telegraphs his punches and is pretty easy to read.
This will look like lewis vs. the bloated Tua minus the dumb haircut and granite chin.