Hendricks can definitely pose problems. I'm not worried though. His wrestling credentials on paper are just that... On paper. They've been non existent in the octagon. Gsp has fought the best wrestlers in the division / Ufc and dominated them all. Not to mention Gsp's game plan will be there to deal with the big hit.
Gsp had got this. Hendricks really only has a punchers chance.
Hendricks will be ready for the takedowns and his resume on paper is one of the best you will see. Those numbers didn't get on that paper for no reason, the skills are there. Knowing that GSP relies very heavy on take downs to win fights, he will be ready himself. Don't be surprised when GSP has problems getting or keeping Johnny down. "Punchers chance" isn't really a good term for this fight IMO. That implies that he has to get lucky and land a heavy punch. He is very skilled with his power shots and the likelihood of him landing a big bomb is very good.