Can you not read properly, or did you just gloss over the spoiler summary only looking for the Zoro parts? Luffy blocked Kaido's attack with CoC and it stopped it at a distance. Luffy punched Kaido in the stomach and head and physical contact wasn't made.
Kaidou attacks Luffy again but Luffy blocks the kanabou with his feet without even touching it. There's lot of black thunder coming out from around his feet. Luffy then jumps at Kaidou with black lighting around his fist. He then hits Kaidou's stomach and chin (without touching him) until Kaidou hits the ground.