I don't believe the punch touched one of Zab's tiny little gonads, it landed on his right side and caught mostly stomach, hip, abdomen, but no cojones.
No controversy at all, Zab was looking for a way out, like he does when things aren't going his way, and he quit like the little bitch/douche he is, plain and simple.
Khan, dominated every round, did what he needed to do in this fight, and won fair and square, good job by him.
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