Manny's chin can withstand a hard hitter opponent. One example is the deadly stalker Antonio Margarito's power punch where he hits MP several haymaker shots but nothing happens to knock him down. I think MP should be listed as one of the top ten boxer's in the modern era who has a great chin. To be honest, you can argue that Manny has a better chin than Hagler because Hagler took a eight count before. Question: Why did Manny not have a problem isolating the Cotto Jab, and Floyd Couldn't?
Tommy Hearns couldn't handle the angles or power manny would give him. Hell, Hearns got out footworked by Hagler, HAGLER! YDKSAB.