He clearly got the better of Berto. I don't know what the hell Berto was thinking. He just let Guerrero push him back against the ropes and punch the hell out of him.
Why didn't he try to use movement and stay away from the ropes? I've never been all that impressed by Berto, other than his speed but this was not a good performance for him.
Berto got dragged to the trenches and was mistaken in thinking that he could outfight him there. Guerrero roughed him up. It might be a good learning experience for Berto. He definitely has a lot to learn from that fight.