Where was that block and evading speed last chapter when slow Ragnarok rocked his head into the ground? 
If he gets hit by shit like that, he will die without realizing vs Zoro.

If he gets hit by shit like that, he will die without realizing vs Zoro.

Even someone as dumb as Drunk Kaido swinging his club left and right can land hits on Kaido, Zoro has ridiculous range and speed, I just don't see Luffy consistently dodging.
And Zoro on average does remarkably, almost exceptionally more damage than Kaido, with his top moves straight up being capable of killing Luffy.
He would literally need to be an entirely different mindset when fighting Zoro, like one tiny misstep can get him killed.