I wasn't surprised. I saw his weakness in his last fight (I mean the one before this one) where he was cornered on the ropes several times, seemingly unable to do anything but just crouching behind the ropes with his head covered with his gloves - clear sign that he was losing his heart in the fight. He definitely has the power, shooking his opponent in the early rounds, but doesn't seem to have the heart to pursue his opponent relentlessly like Pacman. He seemed to be very bothered by the counters of his opponent, as mentioned here by jstrong and I think that was the major reason for his defeat. He just didn't want to take the risk of being countered too much and so wasn't able to score much.