It's logic.... I can't imagine the conversation going well if it was "Hi James, fancy joining us as a rotation option when we fancy three at the back?", He's an established PL defender, and yes where I agree we do need one, can you justify dropping Evans? In my opinion no, and that means are we going to always play a back three, which means Under comes as a rotation player, I don't think so. It seems as though it's an option B if Fofana fail's but in my opinion not the right one, as we will end up with three CB expecting to start every week.