I'm picking Chambers by UD because if you watched the Byrd fight, Chris was doing pretty good before he got k.o.'d. I think Chambers defense is a notch above Byrd at this point and he is a tad faster. He is crafty on the inside so I cant see Povetkin controlling the inside like he did against Byrd. My only worry is Chambers chin, because he hasn't been in with a guy with Alexander's power IMO. He also looked gassed out in the last 2 rounds against Brock so hopefully he has been getting his roadwork in.