My brain tells me martinez is going to win. He has a lot of speed, and pretty good power. But this dude has been known to get into some wars. And I know Chavez can take a punch. Hell I don't think I've ever seen him hurt. With that being said I have no idea whether Martinez has the power to put Chavez down, and if it turns into a slug fest I think Chavez would win, because he's a lot bigger. I wouldn't bet on this fight, but I think I would give the upper hand to Martinez.