Zab doesn't handle getting hit at all well. His chin is a bit shaky, but just any punch effects him and you can tell he doesn't want to get hit. Against PBF he was shying away from jabs, he just shows he doesn't like getting hit back. As far as his trainer situation, he would benefit from someone giving him actual advice rather than just hyping him up and demonstrating how to throw a punch. They have no strategy, and it shows.