Povetkin did not look like he was in the best shape of his career, and he showed some ring rust with poor timing. He did, however, hurt Estrada in the ninth and in the tenth he nearly knocked him out. Had the bout been a twelve rounder, he may have been able to finish Estrada off with a TKO. Estrada, for his part, did not come to lose, and he put up a fight with his own combinations but could not hurt Povetkin enough to slow him down.
Povetkin should be stronger and more powerfull if he is going to beat the superheavyweights. He looks like a medium sized heavyweight with good hand speed and he attacks in combinations. When he uses his jab before those combinations he is most effective. He cannot be faulted for fighting fellow contenders on his way to a possible title fight. He is not good enough to beat either Klitschko -but that is no shame because they are almost unbeatable anyway. He may be the best of rest, time will tell.