I think the Calzaghe - Kessler fight, if any could expose either guy.

We dont know a great deal about Kessler but the general opinion is that He is bigger, stronger, younger, hungrier & more importantly, the 'heir apparent' to the 168 throne. If he gets beat convincingly, he'll be exposed and perceived as the 'heir apparently not.'

Theres a broad section of boxing fans who feel that Calzaghe is the man at 168 and as a worthy champion he should give a good account of him self against the lesser experienced Kessler.

If he looses to Kessler convincingly... Even given his age, he too will be perceived as exposed.

Its a proper bang on 50/50 this one.