That's a good solid assessment. Brook has faced many less talented fighters, but (unlike some) he's also improved every time he's stepped up to the next level. Carson Jones was the biggest stumbling block, but Kell took the rematch to clear up any doubt.
Berto's been out for a while but he's far from and easy target.
Berto's been out for a while but he's far from and easy target.
Although all of those are crap, showcase fights for Kell.
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