Not much but he definitely has a chance.
Age isn't anywhere near the factor for heavyweights as it is at other weightclasses. Stipe can wrestle, he has one punch knockout power and can land it moving forwards or backwards. He also has amazing legkicks that he has all but forgotten in the past half decade.
I don't put any stock whatsoever in people saying he has a cracked chin, Francis KOs everybody in the world that he touches, especially when they run into his fist like Stipe did. Besides, Jones can't bust a grape, he's an amazing fighter but KO power has never been a part of his skillset. Cracked chin or no, it won't be a factor in this fight.