We can't tell who is KOed by the spoilers, BUT, if Zoro states
"I did all I can. I leave the rest to you" and Law is alive, that clearly implies Law > Zoro.
Law did the same with Luffy in Dressrosa. "I leave the rest to you"
I'm just surprised Zoro didn't have another move from Ashura. I was expecting at least 1 more attack. Maybe he'll get it when he fights King.