User blog comment:Kaido King of the Beasts/Chapter 896: After Beating the Mochi, Pop into the Oven/@comment-24850639-20180302165349/@comment-71.13.82.131-20180302201503

If you look at the pictures again you will see that Luffy's punch connects to Katakuri's gut, while Katakuri's punch is dodged by Luffy ducking under it.