Was intrigued so I watched their first, though slow Zhang can actually counter but I think it's Joyce's eyes that cause his loss. He was hit over and over in that right eye. If he can avoid that in this 2nd fight, he will be the victor.
Yeah, no one saw a 40 year old Chinese HW beat a prime boxer in Joyce.
Zhang battered that eyes and shut it down causing the referee to intervene. To be fair with Zhang, he has a long amateur record and a Olympian. So he has that experience years under his belt. And perhaps Joyce might underestimate and never see how tough and powerful his punches are even at his year and this is supposed to be like tune up fight for Joyce.
Not quite trivia for a fan, Zhang for sure has long experience before he even got into pro boxing. He got some power in his hands. Joyce was probably too confident during that time, with no worries in his mind fighting an old dog but suddenly got the trouble after a left hook that ruined his eyesight. Fighting with one eye handicapped Joyce in that first fight.
I doubt Zhang can win again, I think he was just lucky to have pricked Joyce's eyes that lucky day.