In Froch recent statements he said that Martin will not be an easy task for Joshua. In other words he clearly warned Joshua to play safe against Martin. Here is the story & what's your views about this???
http://combatsportsnews.tumblr.com/post/141134685693/carl-froch-backs-anthony-joshua-against-charles
Eh, he makes it sound like an uphill battle but goes on to predict Joshua winning and fighting Fury. I think it's reasonable to be cautious about ANY heavy because KOs come easier but I don't think Froch is saying anything controversial or surprising.